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alloy was prepared by a vacuum induction-melting technology. The microstructural characterization of in situ synthesized TiB and the interfacial structure of TiB/Ti matrix were systematically... are ascribed to the locations of boron (B) atoms in the crystal structure of TiB and the lattice mismatch energy between TiB and Ti matrix. Key words: Ti alloy; casting; microstructure; TiB 1......
Experimental 2.1 Basic characteristics of TC4 alloy Ti-6Al-4V, containing aluminum and vanadium, is a typical martensite α+β two-phase Ti alloy[11]. It is of low conductivity, high strength and high... Micro electrical discharge machining of small hole in TC4 alloy LI Mao-sheng(李茂盛)1, 2, CHI Guan-xin(迟关心)2, WANG Zhen-long(王振龙)1, 2, WANG Yu-kui(王玉魁)2, DAI Li(戴 立)1, 2 1. Key Laboratory of Micro......
Hong-liang, REN Rui-ming. Microstructure of linear friction welded joints of hydrogenated TC4 titanium alloy[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(2): 394-400. [29] 崔昌军, 彭 乔. 钛及钛合金的氢渗过程...文章编号:1004-0609(2015)-11-3100-07 氢在钛晶体中扩散行为的第一性原理 刘 松1, 2,王寅岗1 (1. 南京航空航天大学 材料科学与技术学院,南京 210016； 2. 中航工业金城南京机电液压工程研究中心,南京 211106) 摘 要:采用基于密度泛函理论的第一性原理计算H原子在Ti晶格中占据不同位置的体系能量.通过对体系能量变化的分析,探求......
文章编号:1004-0609(2013)S1-s0198-04 TC4钛合金的真空扩散焊连接 熊进辉,高福洋,陈 斌,郭立栋 (中国船舶重工集团公司 第七二五研究所,洛阳 471039) 摘 要:在不施加中间层的情况下,采用不同工艺参数对TC4钛合金进行真空扩散焊连接.利用光学显微镜分析接头的显微组织结构,利用拉伸试验检测接头力学性能,研究工艺参数对显微组织结构和接头力学性能的影响.结果表明:采用适当的工艺参数可以实现TC4钛合金的真空扩散连接.连接过程中,扩散焊界面经历了紧密接触,塑性变形,元素扩散与反应以及体积扩散微孔消除的过程,焊后形成无明显界面的扩散连接接头,接头的最大室温拉伸强度为958 MPa. 关键词:钛合金；真空扩散焊；显微组织；力学性能；工艺参数 中图分类号:TG 407 文献标志码:A Vacuum......
properties after annealing. Key words: TC4 titanium alloy; roll-die drawing; mechanical property; microstructure 钛及钛合金丝材由于具有耐蚀性好,比强度高,无磁性,生物相容性高,对超声波的阻抗较小,透声系数较高,储氢及较好的形状记忆功能等优点,在航空航天,石油化工,医疗卫生,汽车,建筑以及体... drawing 对以上各组数据取平均值后,绘制丝材的应力曲线图,如图1所示. 图1 不同拉伸工艺生产的TC4钛合金丝的性能 Fig.1 Properties of TC4 alloy wires produced by different methods 如表2,表3及图1所示,辊模拉伸及眼模拉伸后的丝材经过真空退火其抗拉强度均能满足GB/ ......
,冷却和凝固而得到粉末的方法.该工艺制备的粉末具有粒度细小,成分均匀,球形度高,氧含量低且易于实现规模化生产等优点,在微细,球形金属及合金粉末制备领域得到了广泛的应用[13, 15].由于钛合金具有极易氧化和吸氢等特点,因此需采用真空气体雾化法制备氧含量低和球形度高的高品质钛合金粉体材料.本文将采用真空气体雾化法制备TC4合金球形粉末,重点解决粉末的氧含量,球形度和尺寸等关键指标问题,通过对粉末粒度分布,形貌特征进行表征,分析粉末雾化影响因素和形成机理,为3D打印用高品质钛合金粉末制备和产业化应用提供技术支撑和理论指导. 1 实验 雾化原材料为d 40 mm×600 mm的TC4合金棒材,成分如表1所示.采用中南大学自主研制的无坩埚真空气体雾化制粉系统制备球形粉末,真空系统真空度达到1×10-3 Pa,其中,采用感应线圈加热钛合金棒材,加热温度高于熔点100~300 ℃使其熔化......
DOI: 10.11817/j.ysxb.1004.0609.2020-39575 TC4合金焊接熔池微观组织演变的数值模拟与分析 张 敏,黄 超,郭宇飞,张立胜,李继红 (西安理工大学 材料科学与工程学院,西安 710048) 摘 要:在MATLAB模拟平台上基于CA-FE法(元胞自动机-有限元)结合晶粒的形核与生长理论,建立了TC4钛合金瞬态焊接温度场下熔...词:TC4合金；熔池；微观组织；数值模拟；CA-FE法 文章编号:1004-0609(2020)-08-1876-11 中图分类号:TG402 文献标志码:A TC4(Ti-6Al-4V)钛合金作为一种重要的工程材料,具有优良的综合性能,被广泛应用于航空航天,生物医学等领域[1-2].作为TC4......
will decrease after HIP process, and will tend to be equaixed structures at local regions. Key words: ZTi600 Ti alloy; high temperature titanium alloy; heat treatment; microstructure; property 纵观国内外铸造钛合金发..., YOU Tao. Development and applications of the high-strength cast titanium alloy[J]. Foundry, 2007, 56(5): 451. [3] FLOWER H M. Ti'95 science and technology[C]//Proceedings of the Eighth World......
; micro-arc oxidation; TC4 alloy; corrosion; wear property 1 Introduction Titanium alloys are widely and frequently used due to their high specific strength, corrosion resistance and excellent bio-compatibility [1-4]. Usually, Ti6Al4V (TC4) alloy is used in high value-added fields such as aviation, aerospace, bio-medicine and navigation industries as structure-function integrated material [5]. However......
metal and primary weld. However, there was a large amount of Ti element in the weld because of the large melting amount of TC4 alloy induced by the centered welding. The secondary weld was similar... less Ti element in the weld than in the TC4 base metal and the amount of Cu element in the weld is close to that in QCr0.8 alloy. When the primary weld was secondarily non-center welded by the electron......
