The Experts below are selected from a list of 4701 Experts worldwide ranked by ideXlab platform
Xingyang Chen - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen effect on nanoindentation Creep of austenitic stainless steel: A comparative study between primary Creep Stage and steady-state Creep Stage
International Journal of Hydrogen Energy, 2019Co-Authors: Yuanjian Hong, Chengshuang Zhou, Yuanyuan Zheng, Jinyang Zheng, Lin Zhang, Xingyang ChenAbstract:Abstract The hydrogen effect on room temperature Creep of 310 S stainless steel was investigated by using nanoindentation. Hydrogen enhanced the primary Creep of 310 S steel much more significantly compared with the steady-state Creep, which was attributed to the interaction between hydrogen and dislocation. Hydrogen obviously decreased the indentation stress so as to promote the primary Creep, while hydrogen had little effect on the steady-state Creep due to the evolution from mobile dislocation to immobile dislocation.
Huan Sheng Lai - One of the best experts on this subject based on the ideXlab platform.
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The effect of threshold stress on the high-temperature fracture parameter
Materials at High Temperatures, 2019Co-Authors: Huan Sheng Lai, Rong Lin, Xie Hang Duan, Chunmei Bai, Jing Wei Zhang, Kang Lin LiuAbstract:ABSTRACTThe high-temperature fracture parameter Ct is an important parameter that is used to predict the service life and assess the safety of high-temperature structures in the entire Creep Stage....
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The effect of threshold stress on the high-temperature fracture parameter
Materials at High Temperatures, 2019Co-Authors: Huan Sheng Lai, Rong Lin, Xie Hang Duan, Chunmei Bai, Jing Wei Zhang, Kang Lin LiuAbstract:The high-temperature fracture parameter Ct is an important parameter that is used to predict the service life and assess the safety of high-temperature structures in the entire Creep Stage. Therefo...
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study on the estimation of high temperature fracture parameter for mismatched weld Creep cracks
Engineering Fracture Mechanics, 2016Co-Authors: Huan Sheng Lai, K.b YoonAbstract:Abstract Evaluation of the Creep crack growth is very important for predicting the life of high temperature structures. Since C t can uniquely characterize Creep crack growth from the small scale Creep Stage to the extensive steady state Creep Stage, an engineering estimation method of C t was proposed for a crack located in the weld with mismatched material properties between the base material and the weld material based on the simulation results of compact tension specimens. For the crack located in the center of welding seam, C t was estimated by the proposed method under the small scale Creep Stage and by the reference stress method under the extensive steady state Creep Stage; in this way, C t was estimated under the whole Creep Stage. The estimated results agreed well with the simulation results if the width of welding seam of h was no smaller than the size of the stress intensity factor dominance zone.
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Estimation of Ct for weld cracks including HAZ softening region
Materials at High Temperatures, 2016Co-Authors: Huan Sheng Lai, K.b Yoon, Sung Woo Ryu, Xin Peng LinAbstract:Ct is an important parameter in predicting Creep crack growth life from the small-scale Creep Stage to the extensive steady state Creep Stage. In this paper, weld interface and non-interface Creep cracks for compact tension (CT) specimens with heat-affected zone (HAZ) were studied by finite element method (FEM) to systematically research the estimation method of Ct for weld Creep cracks. Simulation results showed that Ct of weld interface cracks could be estimated by Yoon’s method. For weld non-interface cracks, Ct under the small-scale and transition Creep Stages could be exactly estimated by a proposed method. The accuracy of the proposed method was not affected by HAZ, but Yoon’s method was slightly affected by HAZ.
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Estimation of Ct of functionally graded materials under small scale Creep Stage
Composite Structures, 2016Co-Authors: Huan Sheng LaiAbstract:Abstract The crack growth life assessment procedures at high temperature developed for homogeneous Creep materials need to be extended to functionally graded materials (FGMs). In this paper, a proposed method was used to estimate Ct of a FGM with a Creep crack paralleling to the material properties’ gradient direction. Finite element method (FEM) was used to verify the method. The FEM results indicated that the method could exactly estimate Ct under the small scale Creep Stage. Since the method is independent of the gradient variation law of material properties, it can be extended to any kind of gradient variation law of material properties.
Yuanjian Hong - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen effect on nanoindentation Creep of austenitic stainless steel: A comparative study between primary Creep Stage and steady-state Creep Stage
International Journal of Hydrogen Energy, 2019Co-Authors: Yuanjian Hong, Chengshuang Zhou, Yuanyuan Zheng, Jinyang Zheng, Lin Zhang, Xingyang ChenAbstract:Abstract The hydrogen effect on room temperature Creep of 310 S stainless steel was investigated by using nanoindentation. Hydrogen enhanced the primary Creep of 310 S steel much more significantly compared with the steady-state Creep, which was attributed to the interaction between hydrogen and dislocation. Hydrogen obviously decreased the indentation stress so as to promote the primary Creep, while hydrogen had little effect on the steady-state Creep due to the evolution from mobile dislocation to immobile dislocation.
S.v. Kamat - One of the best experts on this subject based on the ideXlab platform.
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Creep Behaviour of SAC387 Lead Free Solder Alloy Reinforced with Single Walled Carbon Nanotubes
Transactions of the Indian Institute of Metals, 2014Co-Authors: V. L. Niranjani, B.s.s. Chandra Rao, Vajinder Singh, S.v. KamatAbstract:The effect of addition of single walled carbon nanotubes (SWCNTs) on Creep behaviour of Sn–3.8Ag–0.7Cu (SAC387) lead free solder alloy was investigated. The Creep tests were carried out using indentation technique by means of a nanoindenter. Modified Garofalo’s Creep model showed an excellent fit to the indentation depth versus time data and was used to extract the Creep parameters. The results showed that the steady state Creep rate as well as primary Creep Stage displacement and primary Creep Stage time decreased with increasing addition of SWCNT to the base alloy.
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The influence of addition of nanosized molybdenum and nickel particles on Creep behavior of Sn–Ag lead free solder alloy
Journal of Alloys and Compounds, 2012Co-Authors: V. L. Niranjani, B.s.s. Chandra Rao, Rajdeep Sarkar, S.v. KamatAbstract:Abstract The effect of addition of nano-sized Ni and Mo particles on Creep behavior of Sn–3.5Ag lead free solder alloy was investigated using a constant load method in a nanoindenter. Modified Garofalo’s equation was found to show an excellent fit to indentation Creep data. It was observed that the steady state Creep rate as well as primary Creep Stage displacement and primary Creep Stage time decreased with increasing addition of Mo and Ni to the base alloy.
Jinyang Zheng - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen effect on nanoindentation Creep of austenitic stainless steel: A comparative study between primary Creep Stage and steady-state Creep Stage
International Journal of Hydrogen Energy, 2019Co-Authors: Yuanjian Hong, Chengshuang Zhou, Yuanyuan Zheng, Jinyang Zheng, Lin Zhang, Xingyang ChenAbstract:Abstract The hydrogen effect on room temperature Creep of 310 S stainless steel was investigated by using nanoindentation. Hydrogen enhanced the primary Creep of 310 S steel much more significantly compared with the steady-state Creep, which was attributed to the interaction between hydrogen and dislocation. Hydrogen obviously decreased the indentation stress so as to promote the primary Creep, while hydrogen had little effect on the steady-state Creep due to the evolution from mobile dislocation to immobile dislocation.