Initial Deformation Behaviors in Lean Duplex Stainless Steel

Metals

Jongryoul Kim¹  Rosa Kim¹  Cheoljun Bae¹ 

[1] Department of Materials Engineering, Hanyang University, 55, Hanyangdaehak-ro, Sangrok-gu, Ansan-si, Gyeonggi-do 15588, Korea;

关键词: duplex stainless steel;    mechanical twins;    microstructure characterization;    EBSD;    TEM;   

DOI  :  10.3390/met10070936

来源: DOAJ

【 摘 要 】

The deformation behaviors of the austenite phase in lean duplex stainless steels were investigated through uniaxial tension tests with different amounts of deformation. Microstructural analysis showed that in the initial deformation stage the deformation in austenite grains had a predominant effect on the strain hardening behavior of the LDX-2101 steel. The initial deformation in the austenite grains was found to be mainly accommodated by the formation of stacking faults. As the deformation increased further, mechanical twins were generated by the initial stacking faults and sequentially interacted with dislocations to accommodate the strain. The analysis of dislocation behavior revealed that the deformation twinning process followed the three-layer twin formation mechanism.

【 授权许可】

Unknown