Effects of Temperature and Secondary Orientations on the Deformation Behavior of Single-Crystal Superalloys

被引：1

作者：

Liu, Sujie ^{[1
,2
]}

Zong, Cui ^{[3
]}

Ma, Guangcai ^{[4
]}

Zhao, Yafeng ^{[1
,5
]}

Huang, Junjie ^{[1
,2
]}

Guo, Yi ^{[1
]}

Chen, Xingqiu ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

[3] Beijing Inst Aeronaut Mat, Natl Key Lab Adv High Temp Struct Mat, Beijing 100095, Peoples R China

[4] Chinese Acad Sci, Inst Met Res, Anal & Test Ctr, Shenyang 110016, Peoples R China

[5] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China

来源：

CRYSTALS | 2024年 / 14卷 / 11期

基金：

中国国家自然科学基金;

关键词：

nickel-based superalloy; secondary orientation; quasi in situ EBSD; geometrically necessary dislocations (GNDs); deformation mechanisms; TENSILE BEHAVIOR; DISLOCATION; MICROSTRUCTURE; DEPENDENCE; PLASTICITY; STRESS; PHASE; RE;

D O I：

10.3390/cryst14110996

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The tensile behavior of single-crystal superalloys was investigated at room temperature (RT) and 850 degrees C, focusing on various secondary orientations. Transmission electron microscopy (TEM) and quasi in situ electron backscatter diffraction (EBSD) were employed to study the deformation mechanisms across length scales. Deformation at 850 degrees C enhanced the tensile ductility of the samples, evidenced by the more uniform coverage of dislocations across the gamma and gamma ' phases, and the fracture mode switched from pure cleavage at room temperature to mixed mode due to accelerated void growth. The influence of secondary orientations on mechanical properties is insignificant at room temperature. However, the ductility of the different secondary orientation samples shows significant variations at 850 degrees C, among which the one with [001] rotated 37 degrees demonstrated superior ductility compared to others.

引用

页数：15

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