An Ideal Ultrafine-Grained Structure for High Strength and High Ductility

作者：Huang, C. X.^*; Hu, W. P.; Wang, Q. Y.; Wang, C.; Yang, G.; Zhu, Y. T.

来源：Materials Research Letters, 2015, 3(2): 88-94.

DOI：10.1080/21663831.2014.968680

• Ultrafine Grains
• Dislocations
• Twins
• Stacking Faults
• Strength and Ductility

An ideal ultrafine-grained (UFG) microstructure for high strength and high ductility should have short dislocation-slip path to impede dislocation slip and very low dislocation density to ensure more room for dislocation accumulation. Such a microstructure is hard to produce, especially for UFG metals produced by severe plastic deformation techniques. Here, we report an ideal UFG structure produced by reverse transformation of deformation-induced martensite in 304 L austenitic stainless steel. It produced small grains and a high density of nanotwins for both high strength and high ductility. This approach is applicable to face-centered cubic metals with low stacking fault energy.

• 出版日期2015
• 单位四川大学; 钢铁研究总院; 成都大学; 南京理工大学