电子束逐层熔化金属成型技术制备多孔Ti-6Ai-4V合金的力学性能

来源期刊:中国有色金属学报2013年第z1期

论文作者:徐勤思 程旭莹 侯文韬 王 哲 李述军 郝玉琳 杨 锐

文章页码:101 - 105

关键词:多孔Ti-6Al-4V合金;电子束熔融;压缩性能;孔隙率;压缩强度

Key words:cellular Ti-6Al-4V; electron beam melting; compressive properties; porosity; compressive strength

摘    要:利用电子束逐层熔化(Additive manufacture-electron beam melting,AM-EBM)金属成型技术制备出菱形十二面体网格结构的多孔Ti-6Al-4V合金,并对其微观组织和力学性能进行了研究。研究结果表明:该多孔材料孔壁组织主要为针状α′马氏体相,同时含有极少量的β相;其弹性模量和压缩强度随孔隙率的增加而降低,相对模量、相对强度与相对密度的关系基本符合Gibson-Ashby模型。

Abstract: Cellular Ti-6Al-4V alloys with reticulated mesh structures were designed by computer aided design (CAD) and manufactured by the electron beam melting (EBM) technique using raw powders with extra low interstitials (ELI). The microstructures and mechanical properties of these cellular alloys were further characterized. The cellular Ti-6Al-4V alloys with acicular microstructures mainly consist of thin α′ martensite with a small amount of β phase. The elastic modulus and compressive strength of these Ti-6Al-4V alloys decrease with the increase of porosity of cellular structures. Moreover, the relationships between relative modulus and density, as well as between relative strength and density, were found to be consistent with the Gibson-Ashby model.

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