Study on Structure and Strength of NbMoTaTi Refractory High Entropy Alloy Fabricated by Laser Cladding Deposition

doi:10.16080/j.issn1671-833x.2018.10.061

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Study on Structure and Strength of NbMoTaTi Refractory High Entropy Alloy Fabricated by Laser Cladding Deposition

更新时间：2025-10-30

- Study on Structure and Strength of NbMoTaTi Refractory High Entropy Alloy Fabricated by Laser Cladding Deposition
- Aeronautical Manufacturing Technology Vol. 61, Issue 10, Pages: 61-67(2018)
- 作者机构：
  
  1. 西安交通大学机械制造系统工程国家重点实验室,西安,710049
  2. 西安交通大学金属材料强度国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2018.10.061
  CLC：
- Published：2018
- 稿件说明：
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李青宇，李涤尘，张航，张安峰，梁景怡，王兴理想，闫浩祺. 激光熔覆沉积成形NbMoTaTi难熔高熵合金的组织与强度研究[J]. 航空制造技术, 2018, 61(10): 61-67.

LI Qingyu, LI Dichen, ZHANG Hang, ZHANG Anfeng, LIANG Jingyi, WANG Xinglixiang,. Study on Structure and Strength of NbMoTaTi Refractory High Entropy Alloy Fabricated by Laser Cladding Deposition[J]. Aeronautical Manufacturing Technology, 2018, 61(10): 61-67.
李青宇，李涤尘，张航，张安峰，梁景怡，王兴理想，闫浩祺. 激光熔覆沉积成形NbMoTaTi难熔高熵合金的组织与强度研究[J]. 航空制造技术, 2018, 61(10): 61-67. DOI： 10.16080/j.issn1671-833x.2018.10.061.

LI Qingyu, LI Dichen, ZHANG Hang, ZHANG Anfeng, LIANG Jingyi, WANG Xinglixiang,. Study on Structure and Strength of NbMoTaTi Refractory High Entropy Alloy Fabricated by Laser Cladding Deposition[J]. Aeronautical Manufacturing Technology, 2018, 61(10): 61-67. DOI： 10.16080/j.issn1671-833x.2018.10.061.

摘要

通过激光熔覆沉积技术制备应用于航空航天工业的NbMoTaTi 难熔高熵合金材料，通过X 射线衍射判断出成形的合金晶体结构为体心立方的单相固溶体结构。高熵合金晶粒尺寸大多在2~12μm 之间；平均显微硬度为397.6HV，室温抗压强度为1301.83MPa，1000℃高温抗压强度只达到347.28MPa，其原因可能与激光熔覆沉积成形NbMoTaTi 高熵合金的过程中产生的气孔、未熔化/ 不完全熔化的Ta 粉末粒子和裂纹有关，需进一步研究。

Abstract

The paper is to prepare the refractory high entropy alloy

NbMoTaTi

in aerospace industry by laser cladding deposition technology. The crystal structure of the alloy is single phase solid solution structure of BCC analyzed by Xray diffraction. The grain size of the NbMoTaTi high entropy alloy is mostly between 2-12μm. The average micro-hardness is 397.6HV and the room temperature compression strength is 1301.83MPa. The high temperature compression strength under 1000℃ is only 347.28MPa because of the defects such as pores

without /incomplete melting Ta powder particles and cracks generated during the forming process of NbMoTaTi high entropy alloys

so further research is needed.

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