论文摘要
采用选区激光熔化技术,在TC4合金基体上制备不同Nb含量的γ-TiAl基Ti-Al-Mn-Nb合金。系统分析Nb含量对合金显微组织和性能的影响规律。研究结果表明,合金主是由四方结构的γ-TiAl和密排六方结构的α2-Ti3Al相组成,且随着Nb含量的增加,合金的凝固组织逐渐由枝晶状结构演化为层片状结构。因高含量Nb在γ-TiAl相中的固溶,以及细小板条状结构的形成,致使Nb含量为7.0 at.%的合金具有最佳的综合性能,即其不仅具有高的硬度(HV2000)、高的强度(1390MPa)和良好的塑性变形能力(24.5%),而且具有良好的摩擦磨损和高温抗氧化性能。
论文目录
文章来源
类型: 期刊论文
作者: Adam Ismaeel,王存山
关键词: 选区激光熔化,基合金,显微组织,性能,添加
来源: Transactions of Nonferrous Metals Society of China 2019年05期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 金属学及金属工艺
单位: 大连理工大学三束材料改性重点实验室
基金: Project(51371041) supported by Chinese Scholarship Council and the National Natural Science Foundation of China
分类号: TG665;TG146.23
页码: 1007-1016
总页数: 10
文件大小: 3525K
下载量: 76
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