韩志豪,张弘斌,周海萍,刘学

• 1:山东科技大学机械电子工程学院
• 2:中国工程物理研究院材料研究所

摘要(Abstract)：

设计了一种新型多组元Ni_3Al合金Ni_(45)Co_(23)Fe_9Al_(11)Ti_(12),并采用激光熔化沉积(LMD)技术成功制备了合金。使用X射线衍射、扫描电镜、万能试验机等研究了沉积态合金的微观组织和室温力学性能。结果表明：LMD制备的Ni_(45)Co_(23)Fe_9Al_(11)Ti_(12)合金的晶粒为沿沉积方向外延生长的粗大柱状晶，晶粒由无侧向分枝的胞状枝晶组成，枝晶内部和枝晶间区域均由网状FCC基体和块状γ′相组成，且枝晶间区域的γ′相尺寸大于晶内。LMD成型的Ni_(45)Co_(23)Fe_9Al_(11)Ti_(12)合金具有良好的室温性能，其屈服强度达到879 MPa,抗拉强度为1160 MPa,断裂伸长率为9.5%,综合力学性能远优于同类合金，其屈服强度的显著提高可能与高密度γ′相有关。

关键词(KeyWords)： 多组元合金;高熵合金;金属间化合物;增材制造;力学性能

Abstract:

Keywords:

基金项目(Foundation): 航空发动机及燃气轮机基础科学中心项目(P2022-C-IV-002-001)

作者(Author): 韩志豪,张弘斌,周海萍,刘学

DOI: 10.13289/j.issn.1009-6264.2023-0592

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