首页|Nanoindentation behavior and creep-induced cracking of long-term crept austenitic steel at 650 ℃

Nanoindentation behavior and creep-induced cracking of long-term crept austenitic steel at 650 ℃

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The grain boundary(GB)damage of long-term crept HR3C(25Cr-20Ni-Nb-N)austenitic steel with solid solution state was investigated by nanoindentation test accompanied with in-situ electron back-scattered diffraction.The corresponding microstructure was characterized by scanning electron microscopy and transmission electron microscopy.Results show that the increase in nanoindentation hardness at the GBs and triple grain junctions may be related to the dislocation accumulation and carbide growth during the creep.Coarsened M23C6 and dislocations piling-up at the GB accelerate the nucleation and coalescence of creep cavity along the GB.The nanoindentation hardness in grains varies with orientation of the stress axis.The orientation difference of neighbor grains may induce local high geometrically necessary dislocation densities and strain gradients near the GB,consequently causing stress concentration and subsequent crack growth at specific GBs.

Austenitic steelCreepNanoindentationGrain orientationCreep-induced cracking

Zhen Zhang、-Yu-hang Duan、Shuai Wang、Jin-shan Chen、An-zhe Wang、Xiang-yang Mao、Yuan-ji Shi、Jie Zhang、Ming Liu、Zheng-fei Hu

展开 >

School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu,China

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology,Nanjing 211167,Jiangsu,China

Jiangsu Wind Power Engineering Technology Center,Nanjing 210023,Jiangsu,China

Nanjing Vocational University of Industry Technology,Nanjing 210023,Jiangsu,China

Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China

Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing,School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,Fujian,China

School of Materials Science and Engineering,Tongji University,Shanghai 201804,China

展开 >

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaOpen Fund of Jiangsu Wind Power Engineering Technology CenterTen thousand talents project of Zhejiang Province

519041565197116351705082ZK22-03-022019R52056

2024

10.1007/s42243-023-00959-9

钢铁研究学报(英文版)
钢铁研究总院

钢铁研究学报(英文版)

CSTPCD
影响因子：0.584
ISSN：1006-706X
年,卷(期)：2024.31(2)
  • 30