马国俊,丁雨田,金培鹏,王冬强

• 1:兰州理工大学有色金属新材料国家重点实验室
• 2:青海大学金属材料研究所

摘要(Abstract)：

研究了单级固溶及峰值时效处理对粉末热挤压法制备5 vol%Mg2B2O5w/6061Al复合材料组织和力学性能的影响。结果表明:经粉末热挤压制备的材料,晶须分布相对均匀,但长径比显著降低,材料主要由α(Al)、Mg2B2O5w和Mg2Si相为主;热挤压态复合材料经固溶时效(510℃×1 h+160℃×9 h)处理后,晶粒内部析出大量的β'相;拉伸强度、屈服强度和伸长率分别为357.6 MPa、205 MPa和8.77%,相比挤压态复合材料,拉伸强度和屈服强度分别提高了81%和78%;拉伸断口分析表明,材料的失效形式以基体的韧性断裂和晶须团聚体的脆性开裂为主。

关键词(KeyWords)： 铝基复合材料;硼酸镁晶须;热挤压;热处理;断口

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 马国俊,丁雨田,金培鹏,王冬强

DOI: 10.13289/j.issn.1009-6264.2014.s1.005

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