体心立方近β钛合金循环形变中的平面滑移行为
Planar Slip Behavior of Near-β Titanium Alloy during Cyclic Deformation Process
摘 要
对单相体心立方近β钛合金在不同加载应力以及循环周次下进行压缩疲劳试验, 对循环过程中的范性应变机制进行分析, 通过研究滑移模式、显微组织演化等对早期微裂纹萌生的影响以及观察疲劳前后位错组态的演化, 分析了循环形变特征与表面滑移模式之间的内在联系。结果表明: 单相近β钛合金经纯压缩循环形变后出现出典型的平面滑移特征以及表面应力集中现象, 循环形变后的位错湮灭、退孪晶和孪晶界结构简化造成的局部应力改变是导致应力集中滑移带出现以及平面滑移机制的重要因素。
压缩疲劳试验
循环形变
平面滑移
位错演化
near-β Ti alloy
compressive fatigue test
cyclic deformation
planar slip
dislocation configuration
Abstract
Fatigue experiments for bcc near-β Ti alloy were carried out under the conditions of different strains and cycles, and the plastic strain mechanism during cycle was analyzed. Internal relation between cyclic deformation characteristic and surface slid mode was analyzed by studying the effects of slip mode, microstructure evolution on early micro-cracks initiation and observing dislocation configuration before and after fatigue testing. The results show that typical planar slip characteristic and surface stress concentration appeared in near-β Ti alloy after compressive cyclic deformation. The stress-localized slip bands as well as the planar slip mechanism were induced by the dislocation annihilation, detwinning progress, and the simplified microstructure upon the stress cycling.
中图分类号 TG111
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51201054); 中国博士后基金资助项目(2012M511400); 教育部科学研究重大项目(311025); 教育部博士点基金新教师类项目(20120111120030)
收稿日期 2012/12/26
修改稿日期 2014/1/25
网络出版日期
作者单位点击查看
备注黄俊(1983-), 女, 安徽安庆人, 副教授, 博士。
引用该论文: HUANG Jun,LI Hui,WANG Zhi-rui,WU Yu-cheng. Planar Slip Behavior of Near-β Titanium Alloy during Cyclic Deformation Process[J]. Materials for mechancial engineering, 2014, 38(3): 5～9
黄俊,李慧,王执锐,吴玉程. 体心立方近β钛合金循环形变中的平面滑移行为[J]. 机械工程材料, 2014, 38(3): 5～9
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参考文献
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【2】MORI H, TOKUWAME M, MIYAZAKI T. Cyclic deformation of silicon-iron single crystals oriented for single glide［J］.Philosophical Magazine: A,1979,40:409-433.
【3】林栋梁,陈贤芬,吴健生.铌单晶恒应变疲劳的位错机制［J］.电子显微学报,1984(4): 49-52.
【4】THEODORSKI G R, KOSS D A. The cyclic stress-strain response of age-hardenable beta titanium alloys［R/OL］.［2012-12-26］.http://rep477.infoeach.com/view-NDc3fDIwMTA4MA==.html.
【5】KOSS D A, WOJCIK C C. Flow stress asymmetry and cyclic stress-strain response in a bcc Ti-V alloy［J］.Metallurgical Transactions: A,1976,7:1243-1244.
【6】CHAKRABORTTY S B, MUKHOPODHYAY T K, STARKE A.The cyclic stress-strain response of titanium-vanadium alloys［J］.Acta Metallurgical,1978,26:909-920.
【7】SALEH Y, MARGOLIN H. Low cyclic fatigue behavior of Ti-Mn alloys: cyclic stress-strain response［J］.Metallurgical and Materials Transactions: A,1980,11:1295-1302.
【8】HUANG J, WANG ZR, ZHOU J. Cyclic deformation response of β-annealed Ti-5Al-5V-5Mo-3Cr alloy under compressive loading conditions［J］.Metallurgical and Materials Transactions: A,2011,42(9):2868-2880.
【9】HUANG J, WANG ZR, ZHOU J. Strain localization and planar-slip behavior in compressive cyclic deformation of the beta-annealed Ti-5Al-5V-5Mo-3Cr alloy［C］// The 12th World Conference on Titanium.Beijing:［s.n］,2011:919-923.
【10】POLK J, LEPISTT, KETTUNEN P. Surface topography and crack initiation in emerging persistent slip bands in copper single crystals［J］.Materials Science and Engineering,1985,74:85-91.
【11】POLK J, PETRENEC M, MAN J. Dislocation structure and surface relief in fatigued metals［J］.Materials Science and Engineering,2005,400/401:405-408.
【12】POLK J, FARDOUN F, DEGALLAIX S. Analysis of the hysteresis loop in stainless steels, II. Austenitic-ferritic duplex steels and the effect of nitrogen［J］.Materials Science and Engineering: A,2001,297:154-161.
【13】PETRENEC M, OBRTLK K, POLK J. Inhomogeneous dislocation structure in fatigued INCONEL 713 LC superalloy at room and elevated temperatures［J］.Materials Science and Engineering: A,2005,400/401:485-488.
【14】FURUHARA T, KISHIMOTO K, MAKI T. Transmission electron microscopy of {332}〈113〉 deformation twin in Ti-15V-3Cr-3Sn-3Al alloy［J］.Material Transactions JIM,1994,35(12):843-850.
【15】XING H, SUN J. Mechanical twinning and omega transition by 〈111〉{112} shear in a metastable β titanium alloy［J］.Applied Physics Letters,2008,93(3):031908.
【16】MEYERS M A, CHAWLA K K. Mechanical behaviour of materials［M］.New Jersey: Prentice-Hall,1992:217,295.
【17】KARNTHALER H P, SCHUGERL. Dislocation structures in plastically deformed, disordered Ni3Fe［C］// Proceedings of 5th Int Conf on the Strength of Metals and Alloys. Oxford: Pergamon Press.1979:205-210.
【18】GEROLD V, KARNTHALER H P. On the origin of planar slip in f.c.c. alloys［J］.Acta Metallurgical,1989,37:2177-2183.
【19】WANG Z R. Cyclic deformation response of planar-slip maretials and a new criteria for wavy-to-planar-slip transition［J］.Philosophical Magazine,2004,84:351-379.
【20】CRECY A DE, BOURRET A, NAKA S, et al. High resolution determination of the core structure of 1/3〈1120〉{1010} edge dislocation in titanium ［J］.Philosophical Magazine: A,1983,47:245-254.
【21】柴惠芬,阮征,范群成.滑移模式对预变形材料循环力学行为的影响［J］.金属学报,1993,29(4):153-158.
【22】INUI H, HONG S I, LAID C. A TEM study of dislocation structures in fatigued Cu-16 at.% Al single crystals［J］.Acta Metallurgical Material,1990,38:2261-2269.
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