选择性激光熔化制备锆基非晶合金的晶化行为分析  

Crystallization Behavior of Zr-Based Amorphous Alloy Prepared by Selective Laser Melting

作　　者：葛亚琼[1] 陈星 畅泽欣 Ge Yaqiong;Chen Xing;Chang Zexin(College of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan,Shanxi 030024,China;College of Materials Science and Engineering Taiyuan University of Technology Taiyuan,Shanxi 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《中国激光》2020年第12期69-76,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(51405324);山西省自然科学基金面上青年基金(201701D221068);山西省重点学科建设经费资助项目;山西省研究生教育改革研究项目(2019JG167);山西省研究生教育创新项目(2019SY481)。

摘　　要：受成形尺寸小、晶化严重等行为的影响,非晶合金的应用受到一定限制。本文以纯锆为基板,采用选择性激光熔化成形技术制备了15 mm×15 mm×15 mm的块体Zr50Ti5Cu27Ni10Al8非晶合金,对其微观组织进行了分析研究,并利用有限元软件ANSYS对该块体非晶合金制备过程中的热效应进行了模拟。研究结果表明:成形试样主要由非晶相组成;由于结构弛豫和晶胚的累积,在热影响区的叠加区发生了晶化,晶化相为Al5Ni3Zr2。本研究为激光增材制备块体非晶合金提供了一种可能有效的方法。The application of amorphous alloy materials is limited by the behavior of small molding size and serious crystallization. With pure zirconium as the substrate, we herein adopted the selective laser melting technology to fabricate a 15 mm×15 mm×15 mm bulk Zr50Ti5Cu27Ni10Al8 amorphous alloy. The sample′s microstructure was analyzed. Moreover, the thermal effect of the preparation process of the bulk amorphous alloy was simulated using ANSYS finite element software. The research results show that the formed amorphous alloy sample is mainly composed of amorphous phase. Crystallization occurs in the superposition area of the heat affected zone because of the accumulation of structural relaxation and crystal embryos. The crystalline phase is Al5Ni3Zr2. This study provides a possibly effective method for preparing bulk amorphous alloy by laser additive manufacturing.

关 键 词：激光技术 选择性激光熔化 非晶合金 晶化行为 结构弛豫 

分 类 号：TG139.8[一般工业技术—材料科学与工程]