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D. P. Mondal - One of the best experts on this subject based on the ideXlab platform.
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microstructure and Compressive Deformation behavior of ss foam made through evaporation of urea as space holder
Materials Chemistry and Physics, 2019Co-Authors: Hemant Jain, Gaurav Gupta, Rajeev Kumar, D. P. MondalAbstract:Abstract Open cell 316L stainless steel foam (SSF) of varying porosities have been developed through powder metallurgy route using evaporative spherical urea particles (UP) as a space holder. Stainless steel powders (SSP) were cold compacted under 500 MPa pressure and sintered at 1200 °C for 1 h in a high vacuum atmosphere (10−4 mbar). Detailed Energy dispersive X-ray spectroscopy (EDS) analysis and X-ray diffraction pattern (XRD) conformed that no residue of space holder (urea) in sintered samples. The Compressive Deformation behavior of sintered foam samples with varying relative densities (ρrd) was conducted at 0.01s−1 strain rate. The yield strength, elastic modulus (Ef), plastic modulus, average plateau stress (σpl) and energy absorption (Eab) of the foam increases with increases in the relative density and these follows power law relationship with relative density. On the other hand, densification strain (ɛd) decreases with increases relative density. This has been discussed with the Deformation mechanism of the stainless steel foam (SSF). Deformation of SSF is associated with cell wall (CW) bending, CW collapse due to bulking followed by shearing and facture of cell wall layer by layer.
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effect of cenosphere particle size and relative density on the Compressive Deformation behavior of aluminum cenosphere hybrid foam
Materials & Design, 2017Co-Authors: D. P. Mondal, Shyam Birla, S Das, Anup Khare, Jai Prakash SinghAbstract:Abstract AlSi12Cu1Mg1-cenosphere hybrid foams (HFs) of varying relative densities were made through stir casting technique using CaH 2 as a foaming agent. Cenospheres of different size ranges were used as a thickening agent, as well as to create micropores in the cell wall. The foaming temperature was varied to vary the relative density, which has not been studied earlier. The combine effect of cenosphere size and relative density on the Compressive Deformation behavior of HFs was investigated. The plastic collapse stress, plateau stress, and energy absorption of hybrid foam increase with decrease in cenosphere size and increase in relative density. On the other hand, the densification strain is almost invariant to the cenosphere size. All the above responses are correlated with relative density and materials parameters of HFs. This study demonstrates that cenosphere a thermal power plant waste can be used to get good quality of hybrid foam.
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effect of cenosphere content on the Compressive Deformation behaviour of aluminum cenosphere hybrid foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017Co-Authors: D. P. Mondal, Shyam Birla, S Das, Deepak Kumar KashyapAbstract:Abstract Al-cenosphere closed cell hybrid foams (HFs) of varying relative densities were made by melt foaming method through stir casting technique. In order to investigate the effect of cenosphere content on the Compressive Deformation behaviour of HFs, varying amounts of cenospheres (18, 25, 30 and 35 vol%) was used as thickening agent and CaH2 (0.6 wt% of alloy) was used as foaming agent. Two types of pores come in this hybrid foam: (i) micropores due to the hollow cenosphere and (ii) macropores due to the entrapment of gas generated. The results showed that the cenospheres particles were uniformly distributed in the cell wall. It was noted that the addition of cenospheres improved the yield strength, the plateau stress, and the energy absorption capacity of HFs, up to a 30 vol% of cenosphere. Further increase in cenosphere content leads to reduction in the plateau stress and the energy absorption capacity of HFs. It is interestingly noted that the densification strain is almost invariant to the cenosphere volume fraction. Attempts are also made to empirically correlate the Deformation response with the cenosphere volume fraction and relative density.
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high temperature Compressive Deformation behavior of za27 sic foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: Sonika Sahu, D. P. Mondal, M D Goel, S DasAbstract:Abstract Compressive Deformation behavior of closed cell zinc aluminum alloy (ZA27)–SiC composite foams with varying relative densities has been studied at varying strain rates (0.001–1 s−1) and temperatures (100–250 °C). The Compressive Deformations of these foams are characterized in terms of plateau stress, densification strain and energy absorption capacity as a function of cell size, relative density, strain rate and temperature. Plateau stress and energy absorption increase with increase in relative density and strain rate; and decrease with increase in temperature. The densification strain on the other hand is noted to be almost invariant to the cell size, strain rate and temperature. The plateau stress, however, decreases marginally with cell size. On the other hand, the energy absorption decreases comparatively to a larger extent with increase in the cell size. This has been discussed in line with the Deformation mechanism of the ZA27–SiC foam.
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effect of strain rate and relative density on Compressive Deformation behavior of aluminum cenosphere syntactic foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: M D Goel, D. P. Mondal, M S Yadav, S K GuptaAbstract:Abstract The Compressive Deformation behavior of aluminum cenosphere syntactic foams of varying densities and cenosphere sizes have been studied at different strain rates (from 0.01/s to 10/s). The plateau stress, densification strain, energy absorption and strain rate sensitivity parameter as a function of relative density, strain rate and cenosphere size have been examined. Densification strain is found to be almost invariant to relative density, strain rate and cenosphere size. But, the plateau stress and energy absorption of syntactic foams are influenced by the relative density and cenosphere size. However, plateau stress is found to be almost invariant to the strain rate. The energy absorption is marginally higher in case of syntactic foam with coarser cenosphere at higher strain rate, whereas reverse is true at lower strain rate. This is attributed to the differences in Deformation mechanism at different strain rates.
S Das - One of the best experts on this subject based on the ideXlab platform.
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effect of cenosphere particle size and relative density on the Compressive Deformation behavior of aluminum cenosphere hybrid foam
Materials & Design, 2017Co-Authors: D. P. Mondal, Shyam Birla, S Das, Anup Khare, Jai Prakash SinghAbstract:Abstract AlSi12Cu1Mg1-cenosphere hybrid foams (HFs) of varying relative densities were made through stir casting technique using CaH 2 as a foaming agent. Cenospheres of different size ranges were used as a thickening agent, as well as to create micropores in the cell wall. The foaming temperature was varied to vary the relative density, which has not been studied earlier. The combine effect of cenosphere size and relative density on the Compressive Deformation behavior of HFs was investigated. The plastic collapse stress, plateau stress, and energy absorption of hybrid foam increase with decrease in cenosphere size and increase in relative density. On the other hand, the densification strain is almost invariant to the cenosphere size. All the above responses are correlated with relative density and materials parameters of HFs. This study demonstrates that cenosphere a thermal power plant waste can be used to get good quality of hybrid foam.
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effect of cenosphere content on the Compressive Deformation behaviour of aluminum cenosphere hybrid foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017Co-Authors: D. P. Mondal, Shyam Birla, S Das, Deepak Kumar KashyapAbstract:Abstract Al-cenosphere closed cell hybrid foams (HFs) of varying relative densities were made by melt foaming method through stir casting technique. In order to investigate the effect of cenosphere content on the Compressive Deformation behaviour of HFs, varying amounts of cenospheres (18, 25, 30 and 35 vol%) was used as thickening agent and CaH2 (0.6 wt% of alloy) was used as foaming agent. Two types of pores come in this hybrid foam: (i) micropores due to the hollow cenosphere and (ii) macropores due to the entrapment of gas generated. The results showed that the cenospheres particles were uniformly distributed in the cell wall. It was noted that the addition of cenospheres improved the yield strength, the plateau stress, and the energy absorption capacity of HFs, up to a 30 vol% of cenosphere. Further increase in cenosphere content leads to reduction in the plateau stress and the energy absorption capacity of HFs. It is interestingly noted that the densification strain is almost invariant to the cenosphere volume fraction. Attempts are also made to empirically correlate the Deformation response with the cenosphere volume fraction and relative density.
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high temperature Compressive Deformation behavior of za27 sic foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: Sonika Sahu, D. P. Mondal, M D Goel, S DasAbstract:Abstract Compressive Deformation behavior of closed cell zinc aluminum alloy (ZA27)–SiC composite foams with varying relative densities has been studied at varying strain rates (0.001–1 s−1) and temperatures (100–250 °C). The Compressive Deformations of these foams are characterized in terms of plateau stress, densification strain and energy absorption capacity as a function of cell size, relative density, strain rate and temperature. Plateau stress and energy absorption increase with increase in relative density and strain rate; and decrease with increase in temperature. The densification strain on the other hand is noted to be almost invariant to the cell size, strain rate and temperature. The plateau stress, however, decreases marginally with cell size. On the other hand, the energy absorption decreases comparatively to a larger extent with increase in the cell size. This has been discussed in line with the Deformation mechanism of the ZA27–SiC foam.
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microarchitecture and Compressive Deformation behaviour of al alloy lm13 cenosphere hybrid al foam prepared using caco3 as foaming agent
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013Co-Authors: D. P. Mondal, S Das, Nidhi Jha, Bilal Gull, Anshul BadkulAbstract:Abstract LM13 Al-alloy–cenosphere aluminium hybrid foam was made by foaming LM13 Al–cenosphere mixture through stir casting technique using CaCO 3 as foaming agent. In the melt mixture 30 vol% of cenosphere was used and the foaming temperature was varied (660 °C and 690 °C). It was interestingly noted that two different kinds of foam architecture at two different temperatures were obtained: partially open and elongated pores with much lower density at 660 °C and closed spherical cells with relatively higher density at 690 °C. The Compressive Deformation behaviour of these foams were examined in order to assess its plateau stress, densification strain and energy absorption and also to understand its Deformation mechanism.
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high temperature Compressive Deformation behaviour of aluminum syntactic foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2012Co-Authors: D. P. Mondal, Anshul Badkul, S Das, Nidhi Jha, Raghavendra KhedleAbstract:Abstract The high temperature Compressive Deformation behaviour of cenosphere filled aluminum syntactic foam has been studied at temperature between 100 °C and 200 °C and strain rate ranging from 10−3/s to 1/s. The plateau stress and densification strain are computed from stress–strain curve at various temperatures and strain rates. The plateau stress decreases with temperature irrespective of strain rate. Interestingly, plateau stress initially decreases with increase in strain rate and reaches to a minimum, and above a certain strain rate it starts increasing with strain rate irrespective of temperature. The densification strain remains invariant with strain rate but increases marginally with temperature. The strain rate sensitivity ‘m’ is found to be negative at a strain rate below the critical value and positive beyond the critical strain rate.
Shyam Birla - One of the best experts on this subject based on the ideXlab platform.
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effect of cenosphere particle size and relative density on the Compressive Deformation behavior of aluminum cenosphere hybrid foam
Materials & Design, 2017Co-Authors: D. P. Mondal, Shyam Birla, S Das, Anup Khare, Jai Prakash SinghAbstract:Abstract AlSi12Cu1Mg1-cenosphere hybrid foams (HFs) of varying relative densities were made through stir casting technique using CaH 2 as a foaming agent. Cenospheres of different size ranges were used as a thickening agent, as well as to create micropores in the cell wall. The foaming temperature was varied to vary the relative density, which has not been studied earlier. The combine effect of cenosphere size and relative density on the Compressive Deformation behavior of HFs was investigated. The plastic collapse stress, plateau stress, and energy absorption of hybrid foam increase with decrease in cenosphere size and increase in relative density. On the other hand, the densification strain is almost invariant to the cenosphere size. All the above responses are correlated with relative density and materials parameters of HFs. This study demonstrates that cenosphere a thermal power plant waste can be used to get good quality of hybrid foam.
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effect of cenosphere content on the Compressive Deformation behaviour of aluminum cenosphere hybrid foam
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017Co-Authors: D. P. Mondal, Shyam Birla, S Das, Deepak Kumar KashyapAbstract:Abstract Al-cenosphere closed cell hybrid foams (HFs) of varying relative densities were made by melt foaming method through stir casting technique. In order to investigate the effect of cenosphere content on the Compressive Deformation behaviour of HFs, varying amounts of cenospheres (18, 25, 30 and 35 vol%) was used as thickening agent and CaH2 (0.6 wt% of alloy) was used as foaming agent. Two types of pores come in this hybrid foam: (i) micropores due to the hollow cenosphere and (ii) macropores due to the entrapment of gas generated. The results showed that the cenospheres particles were uniformly distributed in the cell wall. It was noted that the addition of cenospheres improved the yield strength, the plateau stress, and the energy absorption capacity of HFs, up to a 30 vol% of cenosphere. Further increase in cenosphere content leads to reduction in the plateau stress and the energy absorption capacity of HFs. It is interestingly noted that the densification strain is almost invariant to the cenosphere volume fraction. Attempts are also made to empirically correlate the Deformation response with the cenosphere volume fraction and relative density.
Y.c. Lin - One of the best experts on this subject based on the ideXlab platform.
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three dimensional crystal plasticity finite element simulation of hot Compressive Deformation behaviors of 7075 al alloy
Journal of Materials Engineering and Performance, 2015Co-Authors: Y.c. Lin, Luming Shen, Dongxu WenAbstract:Three-dimensional crystal plasticity finite element (CPFE) method is used to investigate the hot Compressive Deformation behaviors of 7075 aluminum alloy. Based on the grain morphology and crystallographic texture of 7075 aluminum alloy, the microstructure-based representative volume element (RVE) model was established by the pole figure inversion approach. In order to study the macroscopic stress-strain response and microstructural evolution, the CPFE simulations are performed on the established microstructure-based RVE model. It is found that the simulated stress-strain curves and Deformation texture well agree with the measured results of 7075 aluminum alloy. With the increasing Deformation degree, the remained initial weak Goss texture component tends to be strong and stable, which may result in the steady flow stress. The grain orientation and grain misorientation have significant effects on the Deformation heterogeneity during hot Compressive Deformation. In the rolling-normal plane, the continuity of strain and misorientation can maintain across the low-angle grain boundaries, while the discontinuity of strain and misorientation is observed at the high-angle grain boundaries. The simulated results demonstrate that the developed CPFE model can well describe the hot Compressive Deformation behaviors of 7075 aluminum alloy under elevated temperatures.
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Hot Compressive Deformation behavior of 7075 Al alloy under elevated temperature
Journal of Materials Science, 2011Co-Authors: Y.c. Lin, Yu-qiang JiangAbstract:The hot compression tests were conducted with wide strain rates and forming temperature ranges to study the high-temperature Deformation behavior of 7075 Al alloy. The material flow behavior and microstructural evolution during hot-forming process are discussed. Based on the measured stress–strain data, a new constitutive model is proposed, considering the coupled effects of strain, strain rate, and forming temperature on the material flow behavior of 7075 Al alloy. In the proposed model, the material constants are presented as functions of forming temperature. The proposed constitutive model gives good correlations with the experimental results, which confirms that the proposed model can give an accurate and precise estimate of flow stress for 7075 Al alloy.
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effect of temperature and strain rate on the Compressive Deformation behavior of 42crmo steel
Journal of Materials Processing Technology, 2008Co-Authors: Y.c. Lin, Mingsong Chen, Jue ZhongAbstract:Abstract In order to perform numerical simulation of forging and establish the hot formation processing parameters for 42CrMo steel, the Compressive Deformation behaviors of 42CrMo steel were investigated at the temperatures from 850 °C to 1150 °C and strain rates from 0.01 s −1 to 50 s −1 on Gleeble-1500 thermo-simulation machine. It was found that the flow stress of 42CrMo steel is evidently affected by both Deformation temperature and strain rate, i.e., the flow stress decreases with the increase of Deformation temperature and the decrease of strain rate, which can be represented by a Zener–Hollomon parameter in an exponent-type equation. For the relatively high temperature and low-strain rate, a typical flow stress curve is composed of four stages: stage I (work hardening stage), stage II (transition stage), stage III (softening stage) and stage IV (steady stage). While for the relatively low temperature and high-strain rate, stage III (softening stage) and stage IV (steady stage) are not very obvious. The flow stress constitutive equations of hot Deformation for 42CrMo steel were developed. The predicted flow stress curves by the developed constitutive equations well agree with the experimental results, which confirmed that the proposed Deformation constitutive equations can give an accurate and precise estimate of the flow stress for 42CrMo steel, and can be used for the analysis problem of metal-forming processes.
Ping Wang - One of the best experts on this subject based on the ideXlab platform.
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ex situ ebsd analysis of yield asymmetry texture and twinning development in mg 5li 3al 2zn alloy during tensile and Compressive Deformation
Journal of Alloys and Compounds, 2019Co-Authors: Chunlong Cheng, Xiong Zhou, Qiyu Liao, Xingrui Chen, Yonghui Jia, Ping WangAbstract:Abstract In this study, Mg–5Li–3Al–2Zn alloy was successfully fabricated by melting and casting followed by hot extrusion at 573 K. The initial extruded Mg–5Li–3Al–2Zn alloy presented a bimodal structure in which both coarse grains and fine grains coexisted. The asymmetry of tension and compression, texture evolution and twinning types in extruded Mg–5Li–3Al–2Zn alloy during axial tensile and Compressive Deformations were studied. The experimental results showed that the initial texture component of the extruded Mg–5Li–3Al–2Zn alloy was {0001} basal texture, which led to a strong yield asymmetry of tension and compression (TYS/CYS of 1.46). When the alloy was stretched along the axis, the texture changed little. The main Deformation was (10 1 ¯ 0) prismatic slip with few {10 1 ¯ 2} extension twins produced in some coarse grains, which resulted in weak strain hardening. When the compression was along the axial direction, the initial stage of Compressive Deformation was dominated by (0001) basal slip. With the increase in strain, large numbers of {10 1 ¯ 2} extension twins and few {10 1 ¯ 2}-{10 1 ¯ 2} double twins were generated in coarse grains. On the other hand, (0001) planes of some fine grains began to rotate and became perpendicular to ED, resulting in the formation of a weak { 1 ¯ 2 1 ¯ 0} 1 ¯ 0> texture. With further increase in strain, {0001} basal texture was completely transformed into { 1 ¯ 2 1 ¯ 0} 1 ¯ 0> texture. Furthermore, based on theoretical analysis, the extruded Mg–5Li–3Al–2Zn alloy had lower CRSS of prismatic and basal slips compared to other Mg alloys.