The Effect of Primary Laves Phase on Notch Sensitivity in Thermo-span Superalloy

doi:10.1007/s11665-022-07355-6

IMR OpenIR

	The Effect of Primary Laves Phase on Notch Sensitivity in Thermo-span Superalloy
	Zhang, Weiwei 1,2; Tan, Yuanguo 3; Tariq, Naeem ul Haq 4; Si, Tianxiao 5; Wang, Zhiyuan 1,2; Xin, Xin 2; Sun, Wenru 2
通讯作者	Zhang, Weiwei(wwzhang16s@imr.ac.cn)
	2022-11-18
发表期刊	JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
ISSN	1059-9495
页码	11
摘要	Laves phases are regarded as topologically close pack phases in superalloys, which damage mechanical properties, especially notch sensitivity of the material. However, here we innovatively found that the formation of large blocky primary Laves phase in Thermo-Span alloys does not cause notch sensitivity. The influence of primary Laves phases on the notch sensitivity was investigated via electron backscattered diffraction, transmission electron microscopy, and scanning electron microscopy. We found that primary Laves phases eliminate the notch sensitivity through inhibition of gamma' phase precipitation. The reduction of gamma' phases resulted in a decrease in grain-interior strength along with improvement in plasticity, thereby promoting the occurrence of intragranular plastic deformation. The intragranular plastic deformation can coordinate with incompatible deformation among neighboring grains, and thus crack initiation and propagation at grain boundaries was inhibited. These findings provide a new understanding of Laves phases; more importantly, providing a way to improve/eliminate the notch sensitivity of the alloy. Moreover, Abaqus software was employed to assess the stress distribution at different parts of combined-stress rupture samples. It was revealed that the difference in stress distribution at the notched and smooth regions is the main reason associated with different fracture locations for the samples with different resistance to crack initiation and propagation.
关键词	crack propagation Laves phases notch sensitivity thermo-Span alloy gamma ' phases
DOI	10.1007/s11665-022-07355-6
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000885233600005
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176765
专题	中国科学院金属研究所
通讯作者	Zhang, Weiwei
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Southampton, Fac Engn & Environm, Mech Engn Grp, Southampton, Hants, England 4.Pakistan Inst Engn & Appl Sci, Dept Met & Mat Engn, Islamabad, Pakistan 5.Shenyang Univ Technol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Weiwei,Tan, Yuanguo,Tariq, Naeem ul Haq,et al. The Effect of Primary Laves Phase on Notch Sensitivity in Thermo-span Superalloy[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2022:11.
APA	Zhang, Weiwei.,Tan, Yuanguo.,Tariq, Naeem ul Haq.,Si, Tianxiao.,Wang, Zhiyuan.,...&Sun, Wenru.(2022).The Effect of Primary Laves Phase on Notch Sensitivity in Thermo-span Superalloy.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,11.
MLA	Zhang, Weiwei,et al."The Effect of Primary Laves Phase on Notch Sensitivity in Thermo-span Superalloy".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2022):11.