通过基体晶粒和颗粒分布异质结构的调控协同提升AlN_(p)/Al复合材料的强度-塑性  

Enhancing strength−ductility synergy of AlN_(p)/Al composite by regulating heterostructure of matrix grain and particle distribution

作　　者：陈玉瑶 聂金凤[1] 范勇 顾雷 谢可伟 刘相法[2] 赵永好[1] Yu-yao CHEN;Jin-feng NIE;Yong FAN;Lei GU;Ke-wei XIE;Xiang-fa LIU;Yong-hao ZHAO(Nano and Heterogeneous Materials Center,School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Key Laboratory for Liquid−Solid Structural Evolution and Processing of Materials,Ministry of Education,Shandong University,Jinan 250061,China)

机构地区：[1]南京理工大学材料科学与工程学院纳米异构材料中心,南京210094 [2]山东大学材料液固结构演变与加工教育部重点实验室,济南250061

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第4期1049-1064,共16页中国有色金属学报（英文版）

基　　金：supported by the Key P rogram of National Natural Science Foundation of China(No.51931003);the National Natural Science Foundation of China(Nos.52271033,52071179);the Natural Science Foundation of Jiangsu Province,China(No.BK20221493);the Foundation of Qinglan Project for Colleges and Universities in Jiangsu Province,China.

摘　　要：为了获得优异的强塑性能,采用液固反应结合后续的热机械处理方法制备了3种具有不同微观组织构型的异构AlNp/Al复合材料,详细研究了AlN颗粒分布和基体晶粒组织构型对拉伸强度和塑性的影响。结果表明,复合材料的强度和塑性同时提高。其中,具有较弥散颗粒分布的Uniformed-AlNp/Al复合材料表现出优异的极限抗拉强度(~387 MPa)和断裂伸长率(~9.1%)。与其他文献报道的颗粒增强铝基复合材料相比,该复合材料具有较好的比强度和延展性组合。此外,计算了异质变形诱导(HDI)应力。结果表明,在Uniformed-AlNp/Al复合材料中,HDI应力显著增加。揭示了HDI应力在提高AlNp/Al复合材料的强度和塑性中起着至关重要的作用。Three heterostructured AlN_(p)/Al composites with different microstructure configurations were fabricated by liquid−solid reaction combined with subsequent thermal-mechanical treatment to obtain a superior strength and ductility combination.The effects of the microstructure configuration including the AlN particle distribution and matrix grain structure on the tensile strength and ductility were studied in detail.The results show that the simultaneous enhancement of tensile strength and ductility can be achieved.The Uniformed-AlN_(p)/Al composite with relatively dispersed particles exhibits a superior ultimate tensile strength of~387 MPa with an elongation to failure of~9.1%.It shows an outstanding specific tensile strength and elongation combination compared with other reported particle reinforced aluminum matrix composites.Furthermore,the hetero-deformation induced(HDI)stress has been calculated and is shown to increase significantly in the Uniformed-AlN_(p)/Al composite.It is revealed that the HDI stress plays a crucial role in the significant enhancement of strength and ductility for the AlN_(p)/Al composite.

关 键 词：AlNp/Al复合材料 拉伸强度 塑性 异质结构 颗粒分布 强化机制 

分 类 号：TB333[一般工业技术—材料科学与工程]