Achieving strength ductility synergy of multiple hetero-structured Fe–24Mn–10Al–1C duplex lightweight steel

IF 6.1 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Haokun Zhu , Qihan Gao , Yuming Zou , Hua Ding
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引用次数: 0

Abstract

Herein, a hetero-structured Fe-24Mn-10Al-1C (wt.%) lightweight steel is fabricated by a novel two-stage heat treatment strategy. The hetero-structured sample showed excellent mechanical characteristics, with a yield strength of 938 MPa, tensile strength of 1120 MPa and a total elongation of 41 %. In order to clarify the reason why the investigated hetero-structured lightweight steel can achieve excellent mechanical properties, we studied the microscopic deformation behavior of its various phases. By characterizing the microstructure evolution, the pile-up of massive dislocations at grain boundaries and domain boundaries results in significant hetero deformation induced (HDI) stress. This multiple HDI strengthening has an excellent contribution to high strength and good ductility.
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来源期刊
Materials Science and Engineering: A
Materials Science and Engineering: A 工程技术-材料科学:综合
CiteScore
11.50
自引率
15.60%
发文量
1811
审稿时长
31 days
期刊介绍: Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.
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