真空退火处理对冷喷涂铝基复合材料组织与性能的影响

doi:10.13251/j.issn.0254-6051.2021.01.004

金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 19-27.DOI: 10.13251/j.issn.0254-6051.2021.01.004

真空退火处理对冷喷涂铝基复合材料组织与性能的影响

王强^1,2,3, 翟乐^1,2, 牛文娟¹, 张明星⁴

1.西安建筑科技大学冶金工程学院,陕西西安 710000;
2.西安建筑科技大学功能材料加工国家地方联合工程研究中心,陕西西安 710055;
3.陕西省冶金工程技术研究中心,陕西西安 710055;
4.昆士兰大学机械与采矿工程学院,昆士兰州布里斯班 4072

收稿日期:2020-06-22 出版日期:2021-01-25 发布日期:2021-01-26
作者简介:王强(1984—),男,副教授,博士,主要研究方向为冷喷涂技术及应用、航空轻合金表面修复与再制造,E-mail:1031230132@qq.com
基金资助:
国家自然科学基金(51801143);陕西省自然科学基金(2017JZ012)

Effect of vacuum annealing treatment on microstructure and properties of Al-based composites by cold spray process

Wang Qiang^1,2,3, Zhai Le^1,2, Niu Wenjuan¹, Zhang Mingxing⁴

1. School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710000,China;
2. National and Local Joint Engineering Research Center for Functional Materials Processing,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China;
3. Shaanxi Engineering Research Center of Metallurgical,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China;
4. School of Mechanical and Mining Engineering,The University of Queensland,Brisbane Queensland 4072,Australia

Received:2020-06-22 Online:2021-01-25 Published:2021-01-26

摘要/Abstract

摘要： 采用冷喷涂增材制造工艺制备了Al-25Al₂O₃、Al-50Al₂O₃和Al-75Al₂O₃(体积分数,%)具有不同体积含量Al₂O₃颗粒的铝基复合材料,并采用SEM、EBSD、硬度测试和拉伸测试等测试方法分析了真空退火处理对冷喷涂铝基复合材料的微观结构和力学性能的影响。结果表明,Al₂O₃颗粒的加入增加了冷喷涂增材材料的强度和硬度,并随着Al₂O₃含量的增加而增强。这是由于冷喷涂过程中Al₂O₃颗粒的锤击作用导致机械互锁以及严重塑性变形和动态再结晶引起的晶粒细化。退火后材料的强度和硬度将逐渐降低,伸长率逐渐增加,材料内部的组织结构逐渐变得均匀。

关键词: 铝基复合材料, 冷喷涂, 增材制造, 真空退火处理

Abstract: The aluminum matrix composites contained Al₂O₃ particles with different volume content were prepared by cold spraying additive manufacturing process,which included the volume fraction of 25%,50%,and 75%,respectively(i.e.Al-25Al₂O₃,Al-50Al₂O₃,and Al-75Al₂O₃).The influence of vacuum annealing treatment on microstructure and mechanical properties of cold sprayed aluminum matrix composites was analyzed by means of SEM,EBSD,hardness test and tensile test.The results show that the addition of Al₂O₃ particles increases the strength and hardness of the cold spray additive material,which enhances with the increase of Al₂O₃ content.The reason for this is that the hammer action of Al₂O₃ particles in the process of cold sprayed leads to mechanical interlocks and grain refinement due to severe plastic deformation and dynamic recrystallization.However,the strength and hardness of the material gradually decrease after annealing treatment,as well as thegradual increase of elongation.The internal structure of the material gradually become uniform.

Key words: Al-based composites, cold spray process, additive manufacturing, vacuum annealing treatment

中图分类号:

王强, 翟乐, 牛文娟, 张明星. 真空退火处理对冷喷涂铝基复合材料组织与性能的影响[J]. 金属热处理, 2021, 46(1): 19-27.

Wang Qiang, Zhai Le, Niu Wenjuan, Zhang Mingxing. Effect of vacuum annealing treatment on microstructure and properties of Al-based composites by cold spray process[J]. Heat Treatment of Metals, 2021, 46(1): 19-27.

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真空退火处理对冷喷涂铝基复合材料组织与性能的影响

Effect of vacuum annealing treatment on microstructure and properties of Al-based composites by cold spray process

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