基于非等温时效诱导析出行为的2014铝合金同时强化增韧

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI:10.1016/S1003-6326(24)66732-4

Peng-wei LI , Xin WANG , An-hui CAI , Hong-zhi ZHOU , Xiao-peng LIANG , Hui-zhong LI

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引用次数: 0

摘要

非等温时效（NIA）是一种复合热处理工艺，包括加热时效、冷却时效和复杂的溶质析出过程。采用拉伸、疲劳裂纹扩展、硬度和电导率测试，以及高分辨率透射电镜和扫描电镜对2014铝合金在NIA过程中的析出行为和强化增韧机制进行了研究。结果表明：在NIA过程中，θ′相呈现出形核→形核→长大→形核→长大→长大→粗化→长大→粗化→成核→长大→成核的复杂过程。NIA处理使合金具有混合析出的特点，表现为共格相，包括GP区、θ”相、小尺寸θ’相和半共格或非共格相，如大尺寸θ’相和平衡θ相。ni处理的2014铝合金的同时强化和增韧是由颗粒剪切机制和Orowan旁通机制的协同作用引起的。

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Simultaneous strengthening and toughening of 2014 Al alloy based on precipitation behavior induced by non-isothermal aging

Non-isothermal aging (NIA) is a composite heat treatment process that involves heating aging, cooling aging, and complex solute precipitation sequences. The precipitation behavior and the strengthening and toughening mechanisms of the 2014 Al alloy during NIA were studied by employing tensile, fatigue crack growth, hardness, and electronic conductivity tests, as well as high-resolution transmission electron microscopy and scanning electron microscopy. The results show that during NIA, the θ′ phase exhibits a complex process of nucleation, nucleation and growth, nucleation and growth and coarsening, growth and coarsening, nucleation and growth, and nucleation. NIA treatment imparts a mixed precipitation characteristic on the alloy, which is manifested as coherent precipitates, including GP zones, θ′′ phases, small-sized θ′ phases, and semi-coherent or non-coherent precipitates such as large-sized θ′ phases and equilibrium θ phases. The simultaneous strengthening and toughening of the NIA-treated 2014 Al alloy is caused by the synergistic effects of the particle-shearing mechanism and Orowan bypassing mechanism.

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.