高宇翔,李忠文,刘凯,杨东野

• 1:上海工程技术大学材料科学与工程学院

摘要(Abstract)：

采用电子束熔化成形(EBM)技术制备了Ti48Al2Cr2Nb合金试棒，并对其进行后处理。采用X射线衍射仪(XRD)、扫描电镜(SEM)、显微硬度计及万能材料试验机等研究了未处理、热等静压(HIP)及热处理后合金的显微组织及力学性能。结果表明：EBM制备的Ti48Al2Cr2Nb合金组织以γ相和α_2相为主。热等静压处理后，合金的致密度由3.1441 g/cm~3增加至3.5343 g/cm~3,显微硬度由257 HV0.1增加至315 HV0.1。热处理后，合金的晶粒发生明显长大，随着保温温度由1220℃升高至1280℃,等轴γ组织的体积分数由50.12%降低至19.37%。热处理后合金的拉伸强度相较于未处理试样(403 MPa)均有一定下降，1260℃保温120 min后合金的拉伸强度降低至268 MPa。

关键词(KeyWords)： TiAl合金;电子束熔化成形(EBM);热处理;热等静压

Abstract:

Keywords:

基金项目(Foundation): 上海市Ⅲ类高峰学科-材料科学与工程(高能束智能加工与绿色制造)

作者(Author): 高宇翔,李忠文,刘凯,杨东野

DOI: 10.13289/j.issn.1009-6264.2023-0145

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