梯度Al-1.5Mn合金的显微组织及其对力学响应和腐蚀行为的影响

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-19 DOI:10.1016/j.jallcom.2025.179838

Xuantong Lv , Jiabo Chen , Jiaxing Li , Qianru Zhang , Liankui Wu , Fahe Cao , Shuyan Zhang , Tao Yang , Qingqing Sun

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引用次数: 0

摘要

采用超声喷丸强化法制备了梯度组织的Al-1.5Mn合金。表面晶粒细化至150 nm， USSP影响区深度扩大约500 μm。Al6Mn析出于表层，部分溶解于Al基体中。USSP显著提高了表面硬度、屈服强度和抗拉强度，同时保持了优异的塑性。该梯度设计除实现强度-塑性协同外，还实现了强度-耐蚀协同。梯度Al-1.5Mn合金形成较薄的钝化膜。耐蚀性的增强主要归因于微观组织的变化，而不是残余应力的变化。

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Microstructure of gradient Al-1.5Mn alloy and its influence on mechanical response and corrosion behavior

The Al-1.5Mn alloy with a gradient microstructure was fabricated by ultrasonic shot peening (USSP). Surface grain size is refined to as small as 150 nm and the depth of USSP affected zone extending approximately 500 μm. Al₆Mn precipitates in the surface layer partially dissolved into Al matrix. USSP significantly improves the surface hardness, yield strength and tensile strength while maintaining an excellent plasticity. Besides strength-plasticity synergy, strength-corrosion resistance synergy was also achieved by this gradient design. The gradient Al-1.5Mn alloy forms a thinner passive film. Enhanced corrosion resistance is primarily attributed to microstructural changes, instead of the residual stress change.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.