TC18钛合金黑斑特征机理研究
Mechanism research on black fleck characteristic in TC18 titanium alloy
丁晨 1朱峰 1闵新华 1孟庆通1
作者信息
- 1. 宝武特冶钛金科技有限公司,上海 200940
- 折叠
摘要
通过对TC18钛合金黑斑特征的表面宏观形貌观察、高倍金相组织分析和扫描电镜成分分析,研究黑斑特征的成因.结果表明:黑斑特征区域颜色较深并呈连续分布状态,与周围区域具有明显的分界线,为原棒材组织在锻造过程中没有发生相变最终遗留至成品棒材的α-β两相区组织;在扫描电镜能谱分析和电子探针波谱分析过程中发现黑斑特征的0元素含量偏高并导致相变点升高.
Abstract
The mechanism of the black fleck defect in TC18 titanium alloy was studied by surface morphology observation,metallographic microstructure analysis and SEM/EDS analysis.It is indicated that the black fleck defect area,which is dark and continuously distributed,is isolated by the surrounding boundary line.It is proved that the defect area is actually α-β dual phase which is left over to the finished product due to a failure phase transition.Additionally,it was found through SEM/EDS and EPMA/WDS analyses that the oxygen content of the black fleck defect was higher,resulting in a higher β transus temperature.Consequently,the defect area did not undergo phase transition and was present in the finished products.
关键词
TC18/黑斑/缺陷Key words
TC18/black fleck/defect引用本文复制引用
出版年
2024
NETL
NSTL
万方数据