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Effect of post heat treatment on the microstructure and mechanical properties of wire-arc additively manufactured A357 alloy components
Materials Letters ( IF 3 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.matlet.2020.127674
Xuewei Fang , Hui Li , Xiaoge Li , Ke Huang , Lijuan Zhang , Bingheng Lu

Abstract Thin-walled A357 aluminum alloy components were built through wire-arc additive manufacturing. The microstructure and mechanical properties of the as-deposited and heat-treated components were investigated. Experimental results from computerized tomography (CT) showed that the amounts and morphologies of micropores varied from the top, middle, and bottom of all the components. The strength and elongation of the as-deposited and heat-treated samples exhibited close to isotropic characteristics. Subsequent post heat treatment significantly improved the micro hardness and strength of the deposited A357, due to the large amounts of dispersed nanoscale Si particles in the Al matrix.

中文翻译:

后热处理对线弧增材制造A357合金部件组织和力学性能的影响

摘要 A357 铝合金薄壁构件采用线弧增材制造。研究了沉积态和热处理态组件的微观结构和机械性能。计算机断层扫描 (CT) 的实验结果表明,所有组件的顶部、中部和底部的微孔数量和形态各不相同。沉积态和热处理态样品的强度和伸长率表现出接近各向同性的特性。由于大量分散的纳米级硅颗粒在铝基体中,随后的后热处理显着提高了沉积的 A357 的微观硬度和强度。
更新日期:2020-06-01
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