Tensile ductility and deformation mechanisms of a nanotwinned 316L austenitic stainless steel

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 65-69
• 页数: 5页
• 语种: 英文

摘要

A nanotwinned 316L austenitic stainless steel was prepared by means of surface mechanical grinding treatment.After recovery annealing,the density of dislocations decreases obviously while the average twin/matrix lamella thickness still keeps in the nanometer scale.The annealed nanotwinned sample exhibits a high tensile yield strength of (7)71 MPa and a considerate uniform elongation of 8％.TEM observations showed that accommodating more dislocations and secondary twinning inside the nanotwins contribute to the enhanced ductility and work hardening rate of the annealed nanotwinned sample.