A comparison of the microstructure-dependent corrosion of dual-structured Mg-Li alloys fabricated by powder consolidation methods:Laser powder bed fusion vs pulse plasma sintering  

作　　者：Anna Dobkowska Łukasz Zrodowski Monika Chlewicka Milena Koralnik Bogusława Adamczyk-Cieslak Jakub Ciftci Bartosz Moronczyk Mirosław Kruszewski Jakub Jaroszewicz Dariusz Kuc Wojciech Swieszkowski Jarosław Mizera 

机构地区：[1]Faculty of Materials Science and Engineering,Warsaw University of Technology,141 Woloska,02-507 Warsaw,Poland [2]Institute of Materials Engineering,Silesian University of Technology,Krasinskiego 8,40-019 Katowice,Poland

出　　处：《Journal of Magnesium and Alloys》2022年第12期3553-3564,共12页镁合金学报（英文）

摘　　要：In this study, powder metallurgy methods were used to fabricate Mg-7.5Li-3Al-Zn alloys from repowdered extruded alloys. Extruded alloys were powdered using ultrasonic atomization, and then laser powder bed fusion(LPBF) and pulse plasma sintering(PPS) were used to consolidate the bulk materials. A comparison of the properties of the fabricated alloys with those of a conventionally extruded one was carried out using methods that characterized the microstructure and corrosion resistance. When compared to their conventionally extruded counterpart, LPBF and PPS materials exhibited refined microstructures with low enrichment in Al Li and coarse Al, Zn, Mn precipitates. The main drawback of the LPBF alloy, printed for the needs of this study, was its porosity, which had a negative effect on its corrosion. The presence of unrecrystallized particle boundaries in the PPS alloy was also unbeneficial with regard to corrosion. The advantage of the LPBF and PPS processes was the ability to change the proportion of α(Mg) to β(Li), which when the complete consolidation of the material is achievable, may increase the corrosion resistance of dual-structured Mg-Li alloys. The results show that powder metallurgy routes have a wide potential to be used for the manufacture of Mg-Li based alloys.

关 键 词：Additive manufacturing Laser Powder Bed Fusion(LPBF) Pulse Plasma Sintering(PPS) CORROSION Mg-Li alloys 

分 类 号：TG146.22[一般工业技术—材料科学与工程]