利用超音速微粒轰击技术（supersonic fine particles bombarding,SFPB）对钛合金TC4进行了表面纳米化处理,并对SFPB处理后的试样进行不同温度2 h退火处理。借助X射线衍射、显微硬度计、透射电子显微镜和差热分析对纳米化及热处理后的试样进行了组织和性能表征,研究钛合金表面纳米化机理及其热稳定性。结果表明：经过SFPB处理后的试样在表层形成了纳米结构层,随着处理时间的延长,变形层厚度不断增加,晶粒尺寸逐步细化,当SFPB处理30 min后晶粒尺寸趋于稳定,在表层形成了晶粒尺寸约为15 nm具有随机取向的纳米等轴晶。纳米化后的试样在750℃退火时,纳米晶未发生明显粗化,因而具有很好的热稳定性。
A nanocrystalline surface layer was fabricated on TC4 titanium alloy by using supersonic fine particles bombarding（SFPB）,and then was annealed at different temperatures for 2 h.The surface nanocrystallization mechanism and its thermal stability were investigated by means of X-ray diffraction（XRD）,micro-hardness testing,transmission electron microscopy（TEM） and differential thermal analysis（DTA）.The results indicate that the thickness of the nanostructured layer increased with the extension of SFPB treatment time and finally is saturated after SFPB treatment for 30 min.The average size of equiaxed nanocrystallites is approximately 15 nm,which exhibits a random crystallographic orientation on the top surface layer.The nanostructure of the treated surface has an excellent thermal stability up to an annealing temperature of 750 ℃.
参考文献
| [1] | 赵永庆.国内外钛合金研究的发展现状及趋势[J].中国材料进展,2010(05):1-8. |
| [2] | 何利舰,张小农.钛及钛合金的表面处理技术新进展[J].上海金属,2005(03):39-45. |
| [3] | 卢柯;吕坚 .一种金属材料表面纳米层的制备方法[P].中国,99122670.4,1999. |
| [4] | LU K;LU JIAN .Surface nanocrystalliation(SNC)of metallic materials-presentation of the concept behiand a new approach[J].Materals Scienceand Engineering,1999,15(03):193-197. |
| [5] | K. Lu;J. Lu .Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):38-45. |
| [6] | Tao N R;Sui M L;Lu J et al.Surface nanocrystaztion of iron induced by lutrsonic shot peening[J].Nano-Structured Materials,1999,11(04):433-440. |
| [7] | 陶乃镕 .表面机械研磨导致的纯Fe和Inconel 600表面纳米化微观结构及晶粒细化机制研究[D].中国科学院金属研究所,2003. |
| [8] | Zhang H W;Hei Z K;Liu G et al.Formation of nanostrctureed surface layer on AISI 304 stainless steel by means of surface mechanical attritiontreatment[J].Acta Materialia,2003,51:1871-1881. |
| [9] | Roland T;Rtraint D;Lu K et al.Enhanced mechanical behavior of a nanocrystallised stainless steel and its thermal stability[J].Materials Scienceand Engieering A,207:445-446:281-288. |
| [10] | MAI Yong-jin;JIE Xiao-hua;LIU Li-li et al.Theral stability of nanocrystalline layers fabricated by surface nanocrystallization[J].Applied Surface Science,2010,256:1972-1975. |
| [11] | 巴德玛,马世宁,李长青.Cr-Si合金钢表面纳米晶热稳定性的研究[J].材料工程,2008(08):22-25,30. |
| [12] | 颜婧,盛光敏.表面纳米化后表层纳米结构的热稳定性研究现状[J].材料导报,2008(06):45-48. |
| [13] | 王爱香,刘刚,周蕾,王科,杨晓华,李瑛.表面机械研磨处理后316L不锈钢的表层结构及硬度的热稳定性[J].金属学报,2005(06):577-582. |
| [14] | 李业军,齐卫宏,黄伯云,汪明朴.金属纳米微粒晶体结构的稳定性及其结合能[J].中国有色金属学报,2009(03):543-548. |
| [15] | 张建斌,马勤,樊丁,周琦,王静宜.工业纯钛喷丸强化研究[J].稀有金属材料与工程,2001(05):365-368. |
| [16] | Strong crystal size effect on deformation twinning[J].Nature,2010(Jan.21 TN.7279):335. |
| [17] | Ming Wen;Gang Liu;Jian-feng Gu;Wei-ming Guan;Jian Lu .Dislocation Evolution In Titanium During Surface Severe Plastic Deformation[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2009(12):6097-6102. |
| [18] | 胡兰青,马晋芳,许并社.Al-Zn-Mg合金的表面纳米晶化及其热稳定性研究[J].材料热处理学报,2007(z1):343-347. |
| [19] | 胡庚祥;钱苗根.金属学[M].上海:上海科学技术出版社,1980:320. |
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