摘要
向材料内部引入呈梯度分布的晶体缺陷能够有效提高材料的强度,改善材料的韧性。利用扭转变形可以向传统材料内部引入高体积含量梯度晶体缺陷。本文概述了利用扭转变形制备高体积含量梯度结构材料的工艺及研究现状,介绍了扭转梯度纯铜、扭转梯度镁合金以及扭转珠光体钢的微观组织及力学性能,论述了扭转变形对单相及双相材料组织及性能的影响规律及机制。
Introducing gradient distributed crystalline defects into materials can effectively improve the strength and the toughness of the material. The high volume gradient crystal defects can be introduced into the traditional materials by using torsion deformation. The process and research status of high volume content gradient structure materials prepared by using torsion deformation were summarized. Mierostructure and mechanical properties of torsion gradient copper, torsion gradient magnesium alloy and torsion pearlitic steel were introduced. Effect and mechanism of torsion deformation on microstructure and properties of single-phase and dual-phase materials were also discussed.
出处
《热加工工艺》
CSCD
北大核心
2017年第9期28-32,35,共6页
Hot Working Technology
基金
国家自然科学基金项目(51501158
51601154)
西南大学本科生创新基金重大项目(20162303001)
关键词
梯度结构
扭转变形
金属材料
力学性能
gradient microstructure
torsion deformation
metal materials
mechanical property
