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材料工程  2015, Vol. 43 Issue (7): 8-13    DOI: 10.11868/j.issn.1001-4381.2015.07.002
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
Ti-6Al-4V表面超声滚压制备Al2O3膜层的微观组织及性能研究
柳阳1,2, 王东坡1,2, 邓彩艳1,2, 曹舒1,2
1. 天津大学 材料科学与工程学院, 天津 300072;
2. 天津大学 天津市现代连接技术重点实验室, 天津 300072
Microstructure and Properties of Al2O3 Films on Ti-6Al-4V Using Ultrasonic Surface Rolling Processing
LIU Yang1,2, WANG Dong-po1,2, DENG Cai-yan1,2, CAO Shu1,2
1. School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;
2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China
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摘要 运用超声滚压处理(USRP)的方法,在Ti-6Al-4V合金表面制得一层Al2O3薄膜.利用SEM、XRD、光学干涉仪及显微硬度计分析了超声滚压处理后试样表面层的微观组织和性能.结果表明:加入Al2O3粉末进行USRP后可以在基体金属表面形成厚度约为7μm的Al2O3膜层,且结合处基体金属存在残余压应力和塑性变形.相对于母材,处理后试样表面粗糙度降低50%,表面硬度提高98%.同时,处理后试样表面层存在残余压应力场,最大压应力值为-687MPa,位于最表层,残余压应力深度为420μm.加入Al2O3粉末的USRP后的试样,既利用表面Al2O3的加入进一步提高其表面硬度,同时保留了USRP的优势.
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柳阳
王东坡
邓彩艳
曹舒
关键词 Ti-6Al-4V超声滚压处理Al2O3薄膜残余压应力    
Abstract:A layer of Al2O3 thin films on Ti-6Al-4V was prepared by ultrasonic surface rolling processing (USRP). The microstructure and properties of Al2O3 films on the surface layer of Ti-6Al-4V USRP specimen were analyzed using scanning electron microscope (SEM), X-ray diffraction (XRD), optical interferometer and micro hardness tester. The results show that the Al2O3 film layer with thickness about 7μm can be formed on the surface of metal substrate after adding Al2O3 powder and followed by USRP and there are residual compressive stress and plastic deformation in the base metal at the jointing zone. Compared with the parent material, the surface roughness of USRP treated specimen is reduced by 50% and the surface hardness is increased by 98%. Meanwhile, residual compressive stress field exists in the surface layer of the treated specimen, the maximum compressive value is -687MPa, located in the top surface, and the depth of residual compressive stress is 420μm. Based on the above results, for specimens with the addition of Al2O3 powder and after USRP treated, both the surface hardness is further improved with the addition of Al2O3 in the surface, and the advantages of USRP are maintained.
Key wordsTi-6Al-4V    ultrasonic surface rolling processing    Al2O3 film    residual compressive stress
收稿日期: 2014-03-04      出版日期: 2015-07-27
中图分类号:  TG178  
通讯作者: 邓彩艳(1979-),女,副教授,博士,从事超声滚压处理、焊接接头超长寿命的研究工作,联系地址:天津市南开区卫津路92号天津大学材料科学与工程学院(300072)     E-mail: dengcy@tju.edu.cn
引用本文:   
柳阳, 王东坡, 邓彩艳, 曹舒. Ti-6Al-4V表面超声滚压制备Al2O3膜层的微观组织及性能研究[J]. 材料工程, 2015, 43(7): 8-13.
LIU Yang, WANG Dong-po, DENG Cai-yan, CAO Shu. Microstructure and Properties of Al2O3 Films on Ti-6Al-4V Using Ultrasonic Surface Rolling Processing. Journal of Materials Engineering, 2015, 43(7): 8-13.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.07.002      或      http://jme.biam.ac.cn/CN/Y2015/V43/I7/8
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