Effect of crystal orientation on the indentation behaviour of Ni-based single crystal superalloy

被引：26
作者：
Han, Qi-Nan [1 ,2 ,3 ]
Rui, Shao-Shi [3 ,4 ]
Qiu, Wenhui [5 ]
Su, Yue [3 ]
Ma, Xianfeng [6 ]
Su, Zimu [7 ]
Cui, Haitao [1 ,2 ]
Shi, Huiji [3 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Aeroengine Thermal Environm & Struct Key Lab, Minist Ind & Informat Technol, Nanjing 210016, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Peoples R China
[3] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
[4] Tsinghua Univ, Dept Mech Engn, AMPTL, Beijing 100084, Peoples R China
[5] Midea Residential Air Conditioning Div, Foshan 528311, Guangdong, Peoples R China
[6] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China
[7] Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 773卷
基金：
中国国家自然科学基金;
关键词：
Indentation; Crystal orientation; Geometrically necessary dislocation; CPFE simulation; Ni-based single crystal superalloy; DISLOCATION DENSITY DISTRIBUTIONS; FATIGUE-CRACK FORMATION; SITU SEM OBSERVATION; FRETTING FATIGUE; SECONDARY ORIENTATION; EBSD ANALYSIS; LOCALIZED DEFORMATION; STRAIN LOCALIZATION; RATE DEPENDENCE; PLASTICITY;
D O I：
10.1016/j.msea.2019.138893
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The indentation behaviours of Ni-based single crystal (NBSX) superalloy in different crystal orientations are studied by indentation tests and Electron Backscattered Diffraction (EBSD) analysis. The effects of crystal orientations on pile-up modes, dominant slip system distribution and geometrically necessary dislocation (GND) density distribution are revealed by experiments and crystal plasticity finite element (CPFE) simulation. The results and analysis of pyramid and cone indentations show that the pile-up modes produced by different azimuths are significantly different due to the off-plane displacement distribution. The differences of crystallographic slip behaviors under different crystal orientations induce different slip line and indentation symmetry patterns. EBSD observation and CPFE analysis indicate the dependence of GND density distribution on crystal orientations. The results of indentation tests, EBSD observation and CPFE simulation achieve good agreements.
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页数：12
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