Micro & nano letters | |
Analysis of mechanical behaviour of single-phase austenitic stainless steels based on microstructure deformation mechanism | |
article | |
Ya Shi1  Jianqiu Zhou1  | |
[1] School of Mechanical and Power Engineering, Nanjing Tech University;Key Lab of Design and Manufacture of Extreme Pressure Equipment;School of Mechatronics Engineering, Guizhou Minzu University | |
关键词: twinning; plastic flow; austenitic stainless steel; ductility; grain size; stress-strain relations; fracture toughness; mechanical behaviour; single-phase austenitic stainless steel; microstructure deformation mechanism; deformation twins; duplex microstructure; nonrecrystallised grains; nanotwinned austenitic structures; statically recrystallised matrix; uniaxial tension; bimodal grain size distribution; toughness; twin spacing; twin volume fraction; stress-strain curves; ductility; flow stress; fracture toughness; | |
DOI : 10.1049/mnl.2018.5641 | |
学科分类:计算机科学(综合) | |
来源: Wiley | |
【 摘 要 】
The single-phase austenitic stainless steel has attracted widespread attention from scientists because of its special composition. This steel with single-phase but duplex microstructure consists of coarse non-recrystallised grains with nanotwinned austenitic ( nt-γ ) structures and soft statically recrystallised matrix. Additionally, during uniaxial tension, microstructure deformation – deformation twins will occur. Owing to its bimodal grain size distribution and the effect of nt-γ structures, this steel can make a balance between strength and toughness. To analyse the mechanical behaviour of single-phase austenitic stainless steels, the authors proposed a theoretical model based on their physical deformation mechanism. It was found that the flow stress of single-phase austenitic stainless steels will be affected by five factors – the twin spacing, the volume fraction of twins, grain sizes of coarse-grained phase and matrix phase and the ratio of volume fractions of the two phases.
【 授权许可】
CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND
【 预 览 】
Files | Size | Format | View |
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RO202107100002729ZK.pdf | 541KB | download |