钱涛,刘奋成,毛育青,刘强,钱鲁泓

• 1:南昌航空大学轻合金加工科学与技术国防重点学科实验室
• 2:西北工业大学凝固技术国家重点实验室
• 3:昆山华恒焊接股份有限公司

摘要(Abstract)：

采用搅拌摩擦加工(FSP)方法制备了CNTs/7075铝基复合材料,并对其进行固溶时效热处理,研究固溶温度对CNTs/7075组织和力学性能的影响。通过微观组织观察发现,母材中大颗粒的二次相在FSP中被搅碎,随固溶温度提高,被搅碎的细小的二次相逐渐回溶至基材中,且由于回溶后基体合金元素过饱和度增大,复合材料在时效过程中弥散析出的沉淀相数量增多。复合材料中的CuAl_2在固溶过程中回溶入基体中形成过饱和固溶体,在随后时效过程中析出η相(MgZn_2)以及少量S相(Al_2CuMg)。CNTs/7075复合材料的抗拉强度和伸长率随固溶温度升高先上升后下降,当固溶温度为470℃时,抗拉强度相对较高,达到550 MPa,高于母材,伸长率为3.4%,表现为脆性解理断裂。

关键词(KeyWords)： CNTs/7075;搅拌摩擦加工;固溶温度;组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51565041,51365044,51465044);; 江西省教育厅科研项目(GJJ150710)

作者(Author): 钱涛,刘奋成,毛育青,刘强,钱鲁泓

DOI: 10.13289/j.issn.1009-6264.2016.s1.004

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