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Rasim Ipek - One of the best experts on this subject based on the ideXlab platform.
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effect of high ratio of reinforcement particle size to matrix powder size and volume fraction on microstructure densification and tribological properties of sicp reinforced metal matrix composites manufactured via hot pressing method
International Journal of Refractory Metals & Hard Materials, 2015Co-Authors: Ege Anil Diler, Amir Ghiami, Rasim IpekAbstract:Abstract The effects of reinforcement particle to matrix powder size ratio (R s /M s ) and volume fraction of reinforcement particle on the microstructure, densification and tribological properties of SiC p reinforced aluminium (Al–SiC p ) metal matrix composites manufactured via hot-pressing method were investigated for high ratios of R s /M s (1 ≤ R s /M s ≤ 4). Central composite design (CCD) method was used for experimental design. Based on the results obtained in this study, density of 99% could be reached and a uniformly distribution of reinforcement particles in microstructure could be observed for the composite with the volume fraction of 15% and R s /M s ratio of 3.5. Also, the relative density increased as R s /M s ratio increased up to the reinforcement volume fraction of 17.5%. However, an increase in R s /M s ratio had an unfavourable effect on the density at the high volume fractions (≥ 17.5). Results also showed that there was no direct correlation between hardness and wear resistance as a function of volume fraction and R s /M s ratio. The wear tests were performed under adhesive wear condition using pin-on-ring test machine. The results showed that R s /M s ratio had a strong influence on the microstructure and wear behaviour of Al–SiC p composites. Up to the volume fraction of 15%, as the reinforcement particle size or reinforcement particle to matrix powder size ratio increased, the wear loss decreased; however, at the volume fractions higher than 17.5%, wear loss increased with increasing the reinforcement particle to matrix powder size ratio. Both adhesive and abrasive wear mechanisms were the dominant failure mechanisms at the low volume fractions (≤ 15%) while delamination wear was the most dominant failure mechanism for the composites with higher volume fractions (≥ 20%).
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investigation of the wear resistance and microstructure of al sic metal matrix composites as a function of reinforcement volume fraction and reinforcement to matrix particle size ratio applying artificial neural network
International Journal of Materials Research, 2015Co-Authors: Amir Ghiami, Ege Anil Diler, Rasim IpekAbstract:Abstract In this study, the influences of reinforcement volume fraction and the ratio of the reinforcement particle size to the matrix particle size on the wear behaviour of Al/SiC metal matrix composites were investigated by use of a model function obtained from an artificial neural network. Hardness and ball-on-disc wear tests were applied to Al/SiC composites manufactured via a powder metallurgy method. The results indicate that as the reinforcement volume fraction and the ratio of the reinforcement particle size to the matrix particle size increase, the wear loss decreases except in two cases; in the first case (vol.% ≤ 7.5), as the ratio of the reinforcement particle size to the matrix particle size rises, the wear loss increases and then decreases. In the second case, the decreasing trend of wear loss at high values of volume fraction (≥ 15%) declines and then increases where the value of the reinforcement to the matrix particle size ratio is about 1.
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main and interaction effects of matrix particle size reinforcement particle size and volume fraction on wear characteristics of al sicp composites using central composite design
Composites Part B-engineering, 2013Co-Authors: Ege Anil Diler, Rasim IpekAbstract:Abstract The aim of this study was to investigate the effects of matrix particle size, reinforcement particle size, volume fraction, and their interactions on the wear characteristics of Al–SiC p composites. Central composite design method was used to perform a series of experiments. The statistical analysis of experimental results showed that both main effect and interaction effect of factors investigated were effective on the wear behavior of Al–SiC p composites. Wear loss decreased as volume fraction increased; however, beyond volume fraction of 17.5%, it increased due to reinforcement particle clustering depending on volume fraction and matrix particle size to reinforcement particle size ratio. With decreasing of matrix particle size and increasing of reinforcement particle size, wear loss also decreased. However, after a certain volume fraction, large sized reinforcement particles had a negative effect on the wear resistance.
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an experimental and statistical study of interaction effects of matrix particle size reinforcement particle size and volume fraction on the flexural strength of al sicp composites by p m using central composite design
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2012Co-Authors: Ege Anil Diler, Rasim IpekAbstract:Abstract In this study, the effects of reinforcement volume fraction, matrix and reinforcement particle sizes and their interactions on the flexural strength of Al–SiCp metal matrix composites manufactured by powder metallurgy method were investigated by using central composite design (CCD). An experimental plan for CCD with three factors and five levels was used to optimize the required number of experiments. The fabricated composites were reinforced with SiC particles of 2.39, 7.5, 15, 22.5 and 27.61 volume fractions. The particle sizes of 45, 62, 87, 112, and 129 μm were determined for both matrix and reinforcement particles. Experimental and numerical results show that the main effects of factors and their interactions are significant on the flexural strength. Among all factors, the main effect of volume fraction dominates the main effect of other two factors. Interaction between matrix particle size and reinforcement particle size is much more important at low volume fraction compared to that at high volume fraction. The high flexural strength values at low volume fractions are obtained when matrix particle size is equal to or smaller than reinforcement particle size while those at high volume fraction can be only reached when matrix particle size is much smaller than that of reinforcement particle.
Ege Anil Diler - One of the best experts on this subject based on the ideXlab platform.
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effect of high ratio of reinforcement particle size to matrix powder size and volume fraction on microstructure densification and tribological properties of sicp reinforced metal matrix composites manufactured via hot pressing method
International Journal of Refractory Metals & Hard Materials, 2015Co-Authors: Ege Anil Diler, Amir Ghiami, Rasim IpekAbstract:Abstract The effects of reinforcement particle to matrix powder size ratio (R s /M s ) and volume fraction of reinforcement particle on the microstructure, densification and tribological properties of SiC p reinforced aluminium (Al–SiC p ) metal matrix composites manufactured via hot-pressing method were investigated for high ratios of R s /M s (1 ≤ R s /M s ≤ 4). Central composite design (CCD) method was used for experimental design. Based on the results obtained in this study, density of 99% could be reached and a uniformly distribution of reinforcement particles in microstructure could be observed for the composite with the volume fraction of 15% and R s /M s ratio of 3.5. Also, the relative density increased as R s /M s ratio increased up to the reinforcement volume fraction of 17.5%. However, an increase in R s /M s ratio had an unfavourable effect on the density at the high volume fractions (≥ 17.5). Results also showed that there was no direct correlation between hardness and wear resistance as a function of volume fraction and R s /M s ratio. The wear tests were performed under adhesive wear condition using pin-on-ring test machine. The results showed that R s /M s ratio had a strong influence on the microstructure and wear behaviour of Al–SiC p composites. Up to the volume fraction of 15%, as the reinforcement particle size or reinforcement particle to matrix powder size ratio increased, the wear loss decreased; however, at the volume fractions higher than 17.5%, wear loss increased with increasing the reinforcement particle to matrix powder size ratio. Both adhesive and abrasive wear mechanisms were the dominant failure mechanisms at the low volume fractions (≤ 15%) while delamination wear was the most dominant failure mechanism for the composites with higher volume fractions (≥ 20%).
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investigation of the wear resistance and microstructure of al sic metal matrix composites as a function of reinforcement volume fraction and reinforcement to matrix particle size ratio applying artificial neural network
International Journal of Materials Research, 2015Co-Authors: Amir Ghiami, Ege Anil Diler, Rasim IpekAbstract:Abstract In this study, the influences of reinforcement volume fraction and the ratio of the reinforcement particle size to the matrix particle size on the wear behaviour of Al/SiC metal matrix composites were investigated by use of a model function obtained from an artificial neural network. Hardness and ball-on-disc wear tests were applied to Al/SiC composites manufactured via a powder metallurgy method. The results indicate that as the reinforcement volume fraction and the ratio of the reinforcement particle size to the matrix particle size increase, the wear loss decreases except in two cases; in the first case (vol.% ≤ 7.5), as the ratio of the reinforcement particle size to the matrix particle size rises, the wear loss increases and then decreases. In the second case, the decreasing trend of wear loss at high values of volume fraction (≥ 15%) declines and then increases where the value of the reinforcement to the matrix particle size ratio is about 1.
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main and interaction effects of matrix particle size reinforcement particle size and volume fraction on wear characteristics of al sicp composites using central composite design
Composites Part B-engineering, 2013Co-Authors: Ege Anil Diler, Rasim IpekAbstract:Abstract The aim of this study was to investigate the effects of matrix particle size, reinforcement particle size, volume fraction, and their interactions on the wear characteristics of Al–SiC p composites. Central composite design method was used to perform a series of experiments. The statistical analysis of experimental results showed that both main effect and interaction effect of factors investigated were effective on the wear behavior of Al–SiC p composites. Wear loss decreased as volume fraction increased; however, beyond volume fraction of 17.5%, it increased due to reinforcement particle clustering depending on volume fraction and matrix particle size to reinforcement particle size ratio. With decreasing of matrix particle size and increasing of reinforcement particle size, wear loss also decreased. However, after a certain volume fraction, large sized reinforcement particles had a negative effect on the wear resistance.
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an experimental and statistical study of interaction effects of matrix particle size reinforcement particle size and volume fraction on the flexural strength of al sicp composites by p m using central composite design
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2012Co-Authors: Ege Anil Diler, Rasim IpekAbstract:Abstract In this study, the effects of reinforcement volume fraction, matrix and reinforcement particle sizes and their interactions on the flexural strength of Al–SiCp metal matrix composites manufactured by powder metallurgy method were investigated by using central composite design (CCD). An experimental plan for CCD with three factors and five levels was used to optimize the required number of experiments. The fabricated composites were reinforced with SiC particles of 2.39, 7.5, 15, 22.5 and 27.61 volume fractions. The particle sizes of 45, 62, 87, 112, and 129 μm were determined for both matrix and reinforcement particles. Experimental and numerical results show that the main effects of factors and their interactions are significant on the flexural strength. Among all factors, the main effect of volume fraction dominates the main effect of other two factors. Interaction between matrix particle size and reinforcement particle size is much more important at low volume fraction compared to that at high volume fraction. The high flexural strength values at low volume fractions are obtained when matrix particle size is equal to or smaller than reinforcement particle size while those at high volume fraction can be only reached when matrix particle size is much smaller than that of reinforcement particle.
Lei Luo - One of the best experts on this subject based on the ideXlab platform.
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fabrication of ticp ti 6al 4v surface composite via friction stir processing fsp process optimization particle dispersion refinement behavior and hardening mechanism
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013Co-Authors: Yifu Shen, Lei LuoAbstract:Abstract After the process optimization experiments according to a series of principles stated in the paper, the TiC particle-reinforced surface composites were successfully fabricated via friction stir processing (FSP) method on the Ti–6Al–4V alloy substrates, using a surface-reservoir reinforcement placement method for embedding TiC powder into the substrate. A relatively uniformed dispersion and an ultra-refined average size of the introduced TiC reinforcements were obtained. The reinforcement behaviors of dispersion and refinement were investigated in consideration of the plasticized Ti-matrix material-flow characteristics during FSP. Nano-sized martensite-α′ phase and ultra-refined TiC particles were found in the TiC p /Ti–6Al–4V surface composites. The average micro-hardness of the produced surface composites was 680Hv 0.2 . The thicknesses of hardening surface layer with the hardness upon 650Hv 0.2 reached 900 μm. It was further discussed on the hardening mechanisms including ceramic particle strengthening, nano-sized refinement pinning effect and matrix martensite-α′ influence.
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Fabrication of TiCp/Ti–6Al–4V surface composite via friction stir processing (FSP): Process optimization, particle dispersion-refinement behavior and hardening mechanism
Materials Science and Engineering: A, 2013Co-Authors: Yifu Shen, Lei LuoAbstract:Abstract After the process optimization experiments according to a series of principles stated in the paper, the TiC particle-reinforced surface composites were successfully fabricated via friction stir processing (FSP) method on the Ti–6Al–4V alloy substrates, using a surface-reservoir reinforcement placement method for embedding TiC powder into the substrate. A relatively uniformed dispersion and an ultra-refined average size of the introduced TiC reinforcements were obtained. The reinforcement behaviors of dispersion and refinement were investigated in consideration of the plasticized Ti-matrix material-flow characteristics during FSP. Nano-sized martensite-α′ phase and ultra-refined TiC particles were found in the TiC p /Ti–6Al–4V surface composites. The average micro-hardness of the produced surface composites was 680Hv 0.2 . The thicknesses of hardening surface layer with the hardness upon 650Hv 0.2 reached 900 μm. It was further discussed on the hardening mechanisms including ceramic particle strengthening, nano-sized refinement pinning effect and matrix martensite-α′ influence.
Di Zhang - One of the best experts on this subject based on the ideXlab platform.
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configuration design and fabrication of laminated titanium matrix composites
Materials & Design, 2016Co-Authors: Hongqiang Duan, Yuanfei Han, Liqiang Wang, Jianwei Mao, Di ZhangAbstract:Abstract The introduction of particulate reinforcements into titanium alloys can improve the strength and stiffness, but it generally results in unsatisfactory plasticity and ductility. In this study, in situ synthesized multilayer titanium matrix composites were designed and fabricated by learning from the microstructure of nature biological materials with attractive mechanical properties. Laminated Ti-(TiB + La 2 O 3 )/Ti composites with different reinforcement volume fraction were fabricated through powder metallurgy, followed by hot rolling process. The results show that pore defects, TiB whisker and large La 2 O 3 particle agglomerates can be observed in the composites after vacuum sintering at 1573 K, further the pores are disappeared and the grains are refined significantly after hot rolling at 1323 K. Meanwhile, the reinforcements agglomerates are well dispersed and distributed uniformly along the rolling direction. The tensile testing results indicate that the Ti-10 vol.% (TiB + La 2 O 3 )/Ti composite shows promising mechanical properties due to the configuration design of laminated structure, which results in an improvement of 30% in elongation with 2 O 3 )/Ti composites. Moreover, further increase in reinforcement volume fraction leads to slight increase in tensile strength and significant decrease in elongation due to the increasing of large La 2 O 3 agglomerates.
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in situ carbon nanotube covered silicon carbide particle reinforced aluminum matrix composites fabricated by powder metallurgy
Materials Letters, 2016Co-Authors: Shisheng Li, Yishi Su, Qiubao Ouyang, Di ZhangAbstract:Abstract In order to achieve a uniform distribution of carbon nanotube (CNT) reinforcement in aluminum (Al) matrix, novel nano/micro-sized hybrid reinforcements with CNT growing on the surface of SiC particle (SiCp) was synthesized by a chemical vapor deposition method. Subsequently, the hybrid reinforcement (defined as SiCp(CNT)) was mixed in the pure Al matrix by merely blending powder, as a result, CNT was well-dispersed in the matrix with the help of micro-sized SiCp as a “vehicle”. With the novel reinforcement, SiCp(CNT)/Al composite exhibited both improved elastic modulus of 93 GPa (35% higher than that of Al matrix) and tensile strength of 202 MPa (74% higher than that of Al matrix), mainly because CNT was dispersed uniformly and achieved intimate interfaces with Al matrix with the help of well dispersed SiCp.
Yifu Shen - One of the best experts on this subject based on the ideXlab platform.
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fabrication of ticp ti 6al 4v surface composite via friction stir processing fsp process optimization particle dispersion refinement behavior and hardening mechanism
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013Co-Authors: Yifu Shen, Lei LuoAbstract:Abstract After the process optimization experiments according to a series of principles stated in the paper, the TiC particle-reinforced surface composites were successfully fabricated via friction stir processing (FSP) method on the Ti–6Al–4V alloy substrates, using a surface-reservoir reinforcement placement method for embedding TiC powder into the substrate. A relatively uniformed dispersion and an ultra-refined average size of the introduced TiC reinforcements were obtained. The reinforcement behaviors of dispersion and refinement were investigated in consideration of the plasticized Ti-matrix material-flow characteristics during FSP. Nano-sized martensite-α′ phase and ultra-refined TiC particles were found in the TiC p /Ti–6Al–4V surface composites. The average micro-hardness of the produced surface composites was 680Hv 0.2 . The thicknesses of hardening surface layer with the hardness upon 650Hv 0.2 reached 900 μm. It was further discussed on the hardening mechanisms including ceramic particle strengthening, nano-sized refinement pinning effect and matrix martensite-α′ influence.
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Fabrication of TiCp/Ti–6Al–4V surface composite via friction stir processing (FSP): Process optimization, particle dispersion-refinement behavior and hardening mechanism
Materials Science and Engineering: A, 2013Co-Authors: Yifu Shen, Lei LuoAbstract:Abstract After the process optimization experiments according to a series of principles stated in the paper, the TiC particle-reinforced surface composites were successfully fabricated via friction stir processing (FSP) method on the Ti–6Al–4V alloy substrates, using a surface-reservoir reinforcement placement method for embedding TiC powder into the substrate. A relatively uniformed dispersion and an ultra-refined average size of the introduced TiC reinforcements were obtained. The reinforcement behaviors of dispersion and refinement were investigated in consideration of the plasticized Ti-matrix material-flow characteristics during FSP. Nano-sized martensite-α′ phase and ultra-refined TiC particles were found in the TiC p /Ti–6Al–4V surface composites. The average micro-hardness of the produced surface composites was 680Hv 0.2 . The thicknesses of hardening surface layer with the hardness upon 650Hv 0.2 reached 900 μm. It was further discussed on the hardening mechanisms including ceramic particle strengthening, nano-sized refinement pinning effect and matrix martensite-α′ influence.