High dislocation density-induced large ductility in deformed and partitioned steels

B. B. He, B. Hu, H. W. Yen, G. J. Cheng, Z. K. Wang, H. W. Luo, M. X. Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

579 Citations (Scopus)

Abstract

A wide variety of industrial applications require materials with high strength and ductility. Unfortunately, the strategies for increasing material strength, such as processing to create line defects (dislocations), tend to decrease ductility. We developed a strategy to circumvent this in inexpensive, medium manganese steel. Cold rolling followed by low-temperature tempering developed steel with metastable austenite grains embedded in a highly dislocated martensite matrix. This deformed and partitioned (D and P) process produced dislocation hardening but retained high ductility, both through the glide of intensive mobile dislocations and by allowing us to control martensitic transformation. The D and P strategy should apply to any other alloy with deformation-induced martensitic transformation and provides a pathway for the development of high-strength, high-ductility materials.

Original languageEnglish
Pages (from-to)1029-1032
Number of pages4
JournalScience
Volume357
Issue number6355
DOIs
Publication statusPublished - 8 Sep 2017
Externally publishedYes

ASJC Scopus subject areas

  • General

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