高温氧化后Ti6Al4V合金渗氧层的微观结构和力学性能
Microstructure and Mechanical Properties of Oxygen-Diffusion Layer on Ti6Al4V Alloy after High-Temperature Oxidation
摘 要
在850 ℃对Ti6Al4V(TC4)钛合金板分别进行12,24,36,48 h的氧化处理, 研究了高温氧化处理后合金近表面渗氧层的微观结构和力学性能。结果表明: 高温氧化后的钛合金板表面出现了渗氧层, 它是由间隙氧原子的固溶形成的, 渗氧层中的氧含量呈梯度分布; 随着深度增加, 渗氧层的纳米硬度、弹性模量和残余拉应力逐渐下降; 氧原子固溶于基体中引起了晶格常数的变化, 这是导致梯度结构形成且力学性能提高的主要原因; 残余应力的变化是氧化过程中的氧扩散和空冷过程中的热应力共同作用的结果。
渗氧层
弹性模量
力学性能
晶格常数
残余应力
Ti6Al4V alloy
oxygen-diffusion layer
elasticity modulus
mechanical property
lattice parameter
residual stress
Abstract
Ti6Al4V (TC4) alloy plate was oxidized at 850 ℃ for 12, 24, 36, 48 h, respectively, and the microstructure and mechanical properties of oxygen-diffusion layer after high-temperature oxidation were studied. Results show that a surface layer with gradient structure can be formed, and the forming of the layer was due to the solution of the interstitial oxygen atoms after oxidation treatment. The nano hardness value, elasticity modulus as well as residual stress decreased gradually with the increase of depth. The main reason for forming gradient structure and improvement of mechanical properties was attributed to dissolution of oxygen atoms, which leads to the changes of lattice parameters. Oxygen diffusion during oxidation treatment and thermal stress during air-cooling process both lead to the changes of residual stress.
中图分类号 TG146.2 DOI 10.11973/jxgccl201611015
所属栏目 试验研究
基金项目 上海科委基础重大项目(13DJ1400202)
收稿日期 2015/6/16
修改稿日期 2016/9/22
网络出版日期
作者单位点击查看
备注潘仁静(1990-),女, 江苏扬州人, 硕士研究生。
引用该论文: PAN Ren-jing,ZHANG Yang,ZHANG Xian-cheng,TU Shan-tung,QIAN Xia-yi. Microstructure and Mechanical Properties of Oxygen-Diffusion Layer on Ti6Al4V Alloy after High-Temperature Oxidation[J]. Materials for mechancial engineering, 2016, 40(11): 71～74
潘仁静,张 洋,张显程,涂善东,钱夏夷. 高温氧化后Ti6Al4V合金渗氧层的微观结构和力学性能[J]. 机械工程材料, 2016, 40(11): 71～74
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【2】BLOYCE A, QI P Y, DONG H,et al. Surface modification of titanium alloys for combined improvements in corrosion and wear resistance［J］. Surface and Coatings Technology, 1998, 107(2): 125-132.
【3】赵树萍,吕双坤,郝文杰. 钛合金及其表面处理［M］.哈尔滨: 哈尔滨工业大学出版社,2003: 1-2.
【4】TONG W P, TAO N R, WANG Z B,et al. Nitriding iron at lower temperatures［J］. Science, 2003, 299: 686-688.
【5】DONG H, LI X Y.Oxygen boost diffusion for the deep-case hardening of titanium alloys［J］. Materials and Science and Engineering A, 2000, 280(2): 303-310.
【6】OMIDBAKH S H, EBRAHIMI A R, MOUSAVI S H, et al. Effect of oxygen boost diffusion treatment on fatigue behavior of Ti-4Al-2V alloy［J］. Surface & Coating Technology, 2011, 205(8): 2954-2963.
【7】YAN W, WANG X X.Surface hardening of titanium by thermal oxidation［J］. Journal of Materials Science, 2004, 39(16): 5583-5585.
【8】NALLA R K, ALTENBERGER I, NOSTER U, et al. On the influence of mechanical surface treatments—deep rolling and laser shock peening—on the fatigue behavior of Ti-6Al-4V at ambient and elevated temperatures［J］. Materials Science and Engineering A, 2003, 355(1): 216-230.
【9】魏超, 罗勇, 强颖怀, 等. 钛合金的表面渗碳工艺及其耐磨性能［J］. 机械工程材料, 2008, 32(1): 34-36.
【10】陈长军, 马红岩, 张敏, 等. 钛合金的表面渗氧强化研究进展［J］. 热加工工艺, 2007, 36(14): 63-65.
【11】DU H L, DATTA P K, LEWIS D B,et al. Air oxidation behaviors of Ti-6Al-4V alloy between 650 and 850 ℃［J］. Corrosion Science, 1994, 36(4): 631-642.
【12】FRANGINI S, MIGNONE A. Various aspects of the air oxidation behavior of a Ti6Al4V alloy at temperatures in the range 600-700 ℃［J］. Journal of Materials Science, 1994, 29(3): 714-720.
【13】BECKER S, RAHMEL A, SCHORR M,et al. Mechanism of isothermal oxidation of the inel-metallic TiAl and of TiAl alloys［J］. Oxidation of Metals, 1992, 38(5/6): 425-464.
【14】UNN A M, SHENOY R N, CLARK R K. Oxidation of commercial purity titanium［J］. Oxidation of Metals, 1986, 26(3/4): 231-252.
【15】GULERYUZ H, CIMENOGLU H. Oxidation of Ti-6Al-4V alloy［J］. Journal of Alloys and Compounds, 2009,472(1): 241-246.
【16】MA Hong-yan, WANG Mao-cai, WU Wei-tao. Oxygen permeation behaviors and hardening effect of titanium alloys at high temperature［J］.Journal of Materials Science & Technology, 2004, 20(6): 719-723.
【17】姜爱龙, 张平则, 黄俊. TC11钛合金表面渗锆层组织及其摩擦学性能［J］.机械工程材料, 2011, 35(9): 14-17.
【18】OH J M, LEE B G, CHO S W,et al. Oxygen effects on the mechanical properties and lattice strain of Ti and Ti-6Al-4V［J］. Metals and Materials International, 2011, 17(5): 733-736.
【19】WELSCH G, BUNK W.Deformation modes of the α-phase of Ti-6Al-4V as a function of oxygen concentration and aging temperature［J］. Metallurgical Transactions A, 1982, 13(5): 889-899.
【20】LEE Y T, WELSCH G.Young′s modulus and damping of Ti-6Al-4V alloys as a function of heat treatment and oxygen concentration［J］. Materials Science and Engineering A, 1990, 128(1): 77-89.
【21】KLUG H P, ALEXANDER L E. X-ray Diffraction Procedures for polycrystalline and amorphous materials［M］. 2nd ed. New York: Willey, 1974.
【22】WELZEL U, LIGOT J, LAMPARTER P,et al. Stress analysis of polycrystalline thin films and surface regions by X-ray diffraction［J］. Journal of Applied Crystallography, 2005, 38(1): 1-29.
【23】MASSALSKI T B, MURRAY J L, BENNETT H. Binary alloy phase diagrams［M］. USA: American Society for Metals, 1986.
【24】李旭, 彭小燕, 段雨露, 等. 工业纯钛的高温热氧化行为［J］. 中国有色金属学报, 2013, 23(8): 2190-2199.
【25】MONTANARI R, COSTANZA G, TATA M E,et al. Lattice expansion of Ti-6Al-4V by nitrogen and oxygen absorption［J］. Materials Characterization, 2008, 59(9): 334-337.
【26】BLANTER M S, GRANOVSKIY E B, MAGALAS L B.Interaction of dissolved atoms and relaxation due to interstitials atoms in hcp metals ［J］. Material Science and Engineering A, 2004, 370(1): 88-91.
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