炊鹏飞

• 1:陕西理工大学材料科学与工程学院

摘要(Abstract)：

为了提高纯钛表面的力学性能,采用快速多重旋转碾压(FMRR)技术对其表面进行剧烈塑形变形处理。利用X射线衍射仪(XRD)、高分辨透射电子显微镜(HRTEM)及显微硬度计研究了FMRR处理后纯钛表层的微观结构及其硬度。结果表明:FMRR处理后,纯钛的X射线衍射峰均发生明显的宽化,其主要原因是由于剧烈塑性变形导致晶粒细化及产生的微观残余应力所引起的。纯钛经过FMRR处理20 min后,最表层的晶粒被细化到平均大约22 nm,当处理时间增加到40 min时,样品表层的平均晶粒尺寸进一步减小到大约10 nm。处理后样品表层的显微硬度随着处理时间的增加显著提高,最大可达242 HV,比原始样品提高了74%,其主要是由于晶粒尺寸细化及塑性变形引起的加工硬化所致。

关键词(KeyWords)： 快速多重旋转碾压;纯钛;纳米晶;塑性变形

Abstract:

Keywords:

基金项目(Foundation): 陕西省教育厅科研计划项目(14JK1155);; 陕西理工大学博士科研启动项目(SLGQD13(2)-14)

作者(Author): 炊鹏飞

DOI: 10.13289/j.issn.1009-6264.2016-X299

参考文献(References)：

• [1]Lu K,Lu J.Surface nanocrystallization(SNC)of metallic materials-presentation of the concept behind a new approach[J].Journal of Materials Science&Technology,1999,15(3):193-197.
• [2]Chen X H,Lu J,Lu L,et al.Tensile properties of a nanocrystalline 316L austenitic stainless steel[J].Scripta Materialia,2005,52(10):1039-1044.
• [3]Wang Z B,Tao N R,Li S,et al.Effect of surface nanocrystallization on friction and wear properties in low carbon steel[J].Materials Science and Engineering A,2003,352:144-149.
• [4]Zhang J B,Liu Y L,Zhao X Q,et al.Microstructures an microhardness of SNCed medium carbon low alloy steels[J].Materials Science Forum,2005,475/479:137-140.
• [5]刘城,董洪波,张贵华,等.热处理对TC4-DT钛合金拉伸变形后组织的影响[J].材料热处理学报,2015,36(2):21-26.LIU Cheng,DONG Hong-bo,ZHANG Gui-hua,et al.Effect of heat treatment on microstructure of TC4-DT alloy after tensile deformation[J].Transactions of Materials and Heat Treatment,2015,36(2):21-26.
• [6]钱九红.航空航天用新型钛合金的研究发展及应用[J].稀有金属,2000,24(3):218-223.QIAN Jiu-hong.Application and development of new titanium alloys for aerospace[J].Chinese Journal of Rare Metals,2000,24(3):218-223.
• [7]徐玲利,史兴岭,朱治愿.钛合金微弧氧化陶瓷膜的生物摩擦磨损性能[J].材料热处理学报,2015,36(11):162-166.XU Ling-li,SHI Xing-Ling,ZHU Zhi-yuan.Biotribological behaviors of micro-arc oxidation ceramic layer on titanium alloy[J].Transactions of Materials and Heat Treatment,2015,36(11):162-166.
• [8]赵凤娟,宋英,王福平.医用钛合金及其表面活化的研究现状[J].金属热处理,2009,34(2):106-110.ZHAO Feng-juan,SONG Ying,WANG Fu-ping.Research status of biomedical titanium alloy and its surface activation[J].Heat Treatment of Metals,2009,34(2):106-110.
• [9]吴云峰,杨钢,方树铭,等.钛合金微弧氧化影响因素及研究现状[J].热加工工艺,2013,42(8):10-13.WU Yun-feng,YANG Gang,FANG Shu-ming,et al.Effect factor and research status of micro-arc oxidation technique on titanium alloy[J].Hot Working Technology,2013,42(8):10-13.
• [10]Zheng Y F,Cai W,Zhang J X,et al.Microstructural development inside the stress induced martensite variant in a Ti-Ni-Nb shape memory alloy[J].Acta Materialia,2000,48(6):1409-1425.
• [11]Ma G Z,Xu B S,Wang H D,et al.Effects of surface nanocrystallization pretreatment on low-temperature ion sulfurization behavior of 1Cr18Ni9Ti stainless steel[J].Appleid Surface Science,2010,257(4):1204-1210.
• [12]Liu G,Wang S C,Lou X F,et al.Low carbon steel with nanostructured surface layer induced by high-energy shot peening[J].Scripta Materialia,2001,44:1791-1795.
• [13]Klug H P,Alexander L E.X-Ray diffraction Procedures for Polycrystalline and Amorphous Materials[M].Second ed.Wiley,New York,1974:661.
• [14]Hall E O.The deformation and ageing of mild steel:Ⅲ.Discussion of results[J].Proceedings of the Physical Society.Section B,1951,64(9):747-753.
• [15]Petch N J.The cleavage strength of polycrystals[J].The Journal of the Steel and Institute,1953,174:25-28.

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