Anodization Replica of Precipitates in Age-Hardening Ti Alloys
Precipitation-hardening is one of the important strengthening mechanisms which governs the mechanical properties of various kinds of alloys. To characterize the precipitates in age-hardening Ti alloys, traditional metallography and transmission electron microscopy as well as metallurgical replica have been employed for either destructive or nondestructive testing. However, these characterization methods usually depend on skilled sample preparation and analysis,which lacks a good repeatability and sufficient imaging contrast. In the present work,our recent progress is reported in developing a novel replica method to characterize the precipitates in age-hardening Ti alloys. Based on a weak anodization and ultrasonic treatment, anodization replicas of various kinds of precipitates and grain boundaries are successfully fabricated in BT22 and TilOCr alloys. The phase-dependent anodization at different phase areas resulted in the formation of diversified replicas. The in-situ geometric replicas of the precipitates enable us to conduct a multi-scale and multi-dimensional characterization of both the primary and secondary precipitates, which shows great advantages over traditional characterization methods.
Titanium alloy age-hardening precipitation metallography replica
Dongyan Ding Zhaohui Li Yi Yang Congqin Ning Hegang Liu Peng Ge Liang Feng
School of Materials Science and Engineering,State Key Laboratory of Metal Matrix Composites,Shanghai Northwest Institute for Nonferrous Metal Research,Xian Shaanxi,710016,China State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1924-1927
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）