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等径角挤压对AZ31镁合金组织及力学性能的影响

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Indexed by:期刊论文

Date of Publication:2011-02-20

Journal:材料工程

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Issue:2

Page Number:69-72

ISSN No.:1001-4381

Key Words:电磁连铸AZ31镁合金 两步等径角挤压 A路径 微观组织 力学性能

Abstract:研究了电磁连铸AZ31镁合金沿A路径经常规等径角挤压(ECAE)和两步ECAE变形后的微观组织与力学性能.结果表明:与预挤压态相比,常规ECAE态合金随着挤压道次的增加,晶粒不断细化,伸长率不断提高,但屈服强度与抗拉强度逐渐降低;两步ECAE可以使晶粒进一步细化,伸长率、屈服强度与抗拉强度均提高.伸长率、屈服强度与抗拉强度的改变与AZ31镁合金经两步ECAE变形后位错密度增加有关.

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