Effect of Precipitation on the Microhardness Distribution of Diode Laser Epitaxially Deposited IN718 Alloy Coating
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第4期
论文作者：Yaocheng Zhang Zhuguo Li Pulin Nie Yixiong Wu
文章页码：349 - 352
摘 要：<正>The microhardness distribution of the diode laser epitaxially deposited IN718 alloy coating was investigated.The Laves concentration in different regions of the coating was measured by binarization processing.The strengthening phase of the coating was characterized by transmission electron microscopy(TEM).The results showed that the microhardness increased along the depth of the coating.Part of Laves dissolved into austenitic matrix during the successive laser deposition.A little amount of strengthening phase was precipitated in the bottom region of the coating.It was attributed to the heat effect from the thermal cycle of successive deposition on the microstructure in the bottom region of the epitaxially deposited coating.
Yaocheng Zhang1，Zhuguo Li1，Pulin Nie1，Yixiong Wu1,2
1. Shanghai Key Laboratory of Materials Laser Processing and Modification,School of Materials Science and Engineering,Shanghai Jiao Tong University2. State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University
摘 要：<正>The microhardness distribution of the diode laser epitaxially deposited IN718 alloy coating was investigated.The Laves concentration in different regions of the coating was measured by binarization processing.The strengthening phase of the coating was characterized by transmission electron microscopy(TEM).The results showed that the microhardness increased along the depth of the coating.Part of Laves dissolved into austenitic matrix during the successive laser deposition.A little amount of strengthening phase was precipitated in the bottom region of the coating.It was attributed to the heat effect from the thermal cycle of successive deposition on the microstructure in the bottom region of the epitaxially deposited coating.
关键词：
