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Temperature dependence of tensile behavior and deformation microstructure of a Re-containing Ni-base single crystal superalloy
Wang, G. L.; Liu, J. L.; Liu, J. D.; Wang, X. G.; Zhou, Y. Z.; Sun, X. D.; Zhang, H. F.; Jin, T.; Liu, JL; Jin, T (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2017-09-15
发表期刊MATERIALS & DESIGN
ISSN0264-1275
卷号130页码:131-139
摘要Tensile behavior of a Re-containing Ni-base single crystal superalloy with [001] orientation was conducted at from room temperature to 1100 degrees C, and the corresponding deformation microstructure after fracture has been investigated by TEM. This alloy exhibits temperature dependent deformation microstructure and resultant tensile behavior. Shearing of gamma' precipitates by dislocations, with respect to anti-phase boundary (APB) shearing and superlattice stacking fault (SSF) shearing, is mainly controlled by the interplay between gamma/gamma' lattice misfit, intrinsic strength of gamma' phase and stress field of dislocations accumulated on gamma/gamma' interfaces. Below 800 degrees C, the variation with temperature of (0.2%) yield strength is closely linked with the way of dislocations entering.' precipitates, which is largely influenced by temperature dependent gamma/gamma' microstructure modifications. The tensile strength at 1100 degrees C is determined by gliding-climbing of dislocations, with the help of thermal activation, in obviously modified gamma/gamma' microstructure. In fact, flow stresses at 800 degrees C and 1100 degrees C drop remarkably with the onset of numerous APB shearing of gamma' particles after gamma/gamma' misfit stresses are relaxed by depositing dislocations. Last, thermally-activated and plasticity-induced gamma/gamma' microstructure modifications are taken into account to elucidate the deformation microstructure and resulting tensile behavior of this Re-bearing alloy at various temperatures.; Tensile behavior of a Re-containing Ni-base single crystal superalloy with [001] orientation was conducted at from room temperature to 1100 degrees C, and the corresponding deformation microstructure after fracture has been investigated by TEM. This alloy exhibits temperature dependent deformation microstructure and resultant tensile behavior. Shearing of gamma' precipitates by dislocations, with respect to anti-phase boundary (APB) shearing and superlattice stacking fault (SSF) shearing, is mainly controlled by the interplay between gamma/gamma' lattice misfit, intrinsic strength of gamma' phase and stress field of dislocations accumulated on gamma/gamma' interfaces. Below 800 degrees C, the variation with temperature of (0.2%) yield strength is closely linked with the way of dislocations entering.' precipitates, which is largely influenced by temperature dependent gamma/gamma' microstructure modifications. The tensile strength at 1100 degrees C is determined by gliding-climbing of dislocations, with the help of thermal activation, in obviously modified gamma/gamma' microstructure. In fact, flow stresses at 800 degrees C and 1100 degrees C drop remarkably with the onset of numerous APB shearing of gamma' particles after gamma/gamma' misfit stresses are relaxed by depositing dislocations. Last, thermally-activated and plasticity-induced gamma/gamma' microstructure modifications are taken into account to elucidate the deformation microstructure and resulting tensile behavior of this Re-bearing alloy at various temperatures.
部门归属[wang, g. l. ; liu, j. l. ; liu, j. d. ; wang, x. g. ; zhou, y. z. ; zhang, h. f. ; jin, t.] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [wang, g. l. ; sun, x. d. ; zhang, h. f.] northeastern univ, sch mat sci & engn, shenyang 110004, liaoning, peoples r china
关键词Ni-base Single Crystal Superalloy Re-containing Deformation Microstructure Tensile Behavior Gamma/gamma ' Coherency Relaxation Superlattice Stacking Fault Formation
学科领域Materials Science, Multidisciplinary
资助者National High Technology Research and Development Program of China ("863 Program") [20102014AA041701]; National Natural Science Foundation of China [11332010, U1508213, 51331005, 51401210, 51601192, 51671188, 51571196]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78012
专题中国科学院金属研究所
通讯作者Liu, JL; Jin, T (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Wang, G. L.,Liu, J. L.,Liu, J. D.,et al. Temperature dependence of tensile behavior and deformation microstructure of a Re-containing Ni-base single crystal superalloy[J]. MATERIALS & DESIGN,2017,130:131-139.
APA Wang, G. L..,Liu, J. L..,Liu, J. D..,Wang, X. G..,Zhou, Y. Z..,...&Jin, T .(2017).Temperature dependence of tensile behavior and deformation microstructure of a Re-containing Ni-base single crystal superalloy.MATERIALS & DESIGN,130,131-139.
MLA Wang, G. L.,et al."Temperature dependence of tensile behavior and deformation microstructure of a Re-containing Ni-base single crystal superalloy".MATERIALS & DESIGN 130(2017):131-139.
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