沈玲莉,陆宝山,季业益,关集俱,李强伟

• 1:苏州工业职业技术学院机电工程系
• 2:苏州工业职业技术学院精密制造工程系
• 3:苏州大学机电工程学院

摘要(Abstract)：

以摩擦搅拌工艺添加微米级Ni颗粒于6061Al基材内,经T6热处理后产生了Al-Ni金属化合物,最终形成同时具有Ni颗粒、Al-Ni金属强化相及基材特性的局部复合材料。采用X射线衍射仪(XRD)、光学显微镜等分析了复合材料的强化机制;以纳米压痕试验、拉伸试验和摩擦磨损试验等分析了复合材料的力学性能。结果表明:Ni颗粒经多道次摩擦搅拌工艺搅入至6061Al基材后的强化机制为细晶强化与弥散强化,经T6热处理后,Ni颗粒与Al基体发生化合反应,形成Al_3Ni、Al_3Ni_2等金属强化相,进一步提升了复合材料的力学性能;Ni颗粒与铝基体材料间有良好的接合性,有助于提升复合材料的抗拉强度、屈服强度和伸长率,但经T6热处理后,复合材料的伸长率有所下降,抗拉强度有明显上升;添加2.0 mass%Ni颗粒的复合材料,无论是否经过T6热处理均具有最佳的耐磨性能。

关键词(KeyWords)： 摩擦搅拌工艺;铝基复合材料;强化机制;力学性能

Abstract:

Keywords:

基金项目(Foundation): 江苏省自然科学基金青年基金(BK20170373);; 国家自然科学基金青年基金(51805345);; 江苏高校“青蓝工程”资助项目(2019);; 苏州市重点实验室资助项目(SZS201815)

作者(Author): 沈玲莉,陆宝山,季业益,关集俱,李强伟

DOI: 10.13289/j.issn.1009-6264.2020-0173

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