2015 journal article

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

MATERIALS RESEARCH LETTERS, 3(2), 88–94.

By: C. Huang *, W. Hu*, Q. Wang*, C. Wang*, G. Yang * & Y. Zhu n 

co-author countries: China πŸ‡¨πŸ‡³ Germany πŸ‡©πŸ‡ͺ United States of America πŸ‡ΊπŸ‡Έ
author keywords: Ultrafine Grains; Dislocations; Twins; Stacking Faults; Strength and Ductility
Source: Web Of Science
Added: August 6, 2018

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 304β€…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.