伍波,苏旭平,涂浩,刘亚,彭浩平,王建华

• 1:常州大学材料科学与工程学院
• 2:江苏省油气储运技术重点实验室
• 3:常州大学

摘要(Abstract)：

采用光学显微镜、扫描电镜和能谱仪等研究了2618-Ti铝合金制备过程中的显微组织演变和硬度变化。结果表明,2618-Ti铝合金铸态组织主要由等轴状α(Al)相、晶间低熔点共晶组织、分布于晶内和晶界的针状Al9Fe Ni相和存在于晶内的细小Al3Ti相组成。均匀化处理后,在Al3Ti相周围形成了Al18Mg3Ti2相,合金的晶粒组织明显长大。热轧变形后,Al9Fe Ni相得到碎化,呈现为明显的变形组织特征。冷轧后的晶粒组织沿轧制方向伸长,Al9Fe Ni相得到了明显的碎化,Al3Ti相得到了一定程度的破碎。固溶处理后,2618-Ti铝合金晶粒组织变为近似等轴晶,其平均尺寸有所增大。时效处理后,2618-Ti铝合金的晶粒组织没有变化。不同加工状态的2618-Ti铝合金具有不同的硬度值,但该合金时效后的硬度明显低于2168铝合金时效后的硬度值。

关键词(KeyWords)： 2618-Ti铝合金;均匀化;固溶;时效;硬度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51074030);; “青蓝工程”资助项目(2011)

作者(Author): 伍波,苏旭平,涂浩,刘亚,彭浩平,王建华

DOI: 10.13289/j.issn.1009-6264.2014.12.009

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