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TC4钛合金的微动疲劳行为研究 丁文江1,王珉2,张明2,卫中山1 (1.上海交通大学,上海,200030;2.南京航空航天大学,江苏,南京,210016) 摘要:研究了TC4钛合金在柱面-平面接触条件下的微动疲劳行为.通过观察微动区的磨损特征和截面形貌,分析了微动疲劳损伤机制,探讨了磨屑的形成与演变过程及其对微动疲劳行为的影响,考察了摩擦系数随时间的变化.结果表明,TC4钛合金微动区的损伤机制以粘着磨损,磨粒磨损和接触疲劳为主,并伴有氧化磨损.磨屑是基体材料脱落,破碎,氧化形成的,磨屑中的硬质氧化物颗粒促进了合金表面的磨粒磨损,加速了疲劳失效. 关键词:TC4钛合金; 微动疲劳; 磨屑; [全文内容正在添加中] ......
LY12铝合金表面电火花强化层组织与性能研究 苏勋家1,谷建荣2,李平1,侯根良1,郭锋1 (1.第二炮兵工程学院,西安,710025;2.中国人民解放军96633部队,北京,100096) 摘要:采用自制电火花强化机,以TC4合金作为电极,在空气介质中对LY12铝合金进行了表面强化.分别用扫描电镜,电子能谱分析仪与X射线衍射仪对强化层的组织,成分与结构进行了分析与研究;用显微硬度计与磨损试验机等实验设备对强化层的显微硬度与耐磨性进行了测量与分析.结果表明:强化层连续,致密,与基体之间呈冶金结合;主要由钛-铝金属间化合物和钛或铝的氮,氧化物相组成,显微硬度可达HV596;在干摩擦磨损实验条件下,强化后试样磨损体积仅为未强化试样的1/7.铝合金表面性能得到显著改善. 关键词:铝合金; TC4合金; 电火花; 表面强化; aluminum alloy; TC4 titanium......
:A Effect of cooling rate on distortion, microstructure and mechanical properties of TC4 alloy plate LI Pei-yue, ZHANG Bin-bin, LI Liang, LI Zhao-feng, CHEN Bin, LI Shi-kai (Luoyang Ship Material Research Institute, Luoyang 471039, China) Abstract: The effect of cooling rate after solution treatment on the distortion, microstructure and mechanical properties of TC4 alloy disk was systemically......
Microstructure of a two-phase titanium alloy by rapid solidification technique LIU Xing-xing(刘星星)1, 2, LONG Ling(龙玲)1, 2, YAN Biao(严彪)1, 2, TANG Ren-jian(唐人剑)1, 2, ZOU Hong-liu(邹洪流)1, 2 1...: italic"> Abstract: Ribbons of the two-phase titanium alloy were......
TC4钛合金在甲醇溶液中的应力腐蚀敏感性研究 殷京瓯1,张琳2,卢剑3,丁宝峰2,吴荫顺2,曹备2 (1.西北有色金属研究院,陕西,西安,710016;2.北京科技大学,北京,100083;3.宝鸡有色金属加工厂,陕西,宝鸡,721014) 摘要:采用慢应变速率试验,辅以扫描电镜,金相观察等分析测试技术,研究了钛合金TC4在甲醇,盐酸-甲醇溶液中的应力腐蚀敏感性.试验结果表明,TC4钛合金在甲醇中具有应力腐蚀敏感性.甲醇中加入盐酸,明显地提高了TC4的应力腐蚀敏感性.TC4钛合金在盐酸-甲醇溶液中的应力腐蚀裂纹源自点蚀孔底部. 关键词:钛合金; 应力腐蚀; 甲醇溶液; 点蚀; titanium alloy; stress corrosion; methanol solution; pitting corrosion; [全文内容正在添加中] ......
Technology of centrifugal casting for titanium alloyTIAN Jing(田 竞), XIAO Shu-long(肖树龙),CHEN Yu-yong(陈玉勇), CHEN Zi-yong(陈子勇)(National Key Laboratory for Precision Hot Processing of Metals, School... for titanium alloys were studied. Low priced refractory and binder materials were used in the process of preparing shell moulds, the parameters of preparing wax moulds, mould shells were optimized......
Aging characteristics of new metastable beta titanium alloy GE Peng(葛鹏), ZHOU Wei(周伟), ZHAO Yong-qing(赵永庆), ZHOU Lian(周廉) Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China... for a new metastable beta titanium alloy named Ti-B20 subjected to different solution treatments. Microstructural examination shows that precipitate-free zones, which are present in the many......
on Arrhenius formula, and the processing map of TC4-DT titanium alloy was constructed, which provided reference for the hot working of the alloy. Key words: TC4 - DT titanium alloy; thermal deformation... thermal deformation and processing of TC4-DT titanium alloy[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(x): xxxx-xxxx. DOI: 10.11817/j.ysxb.1004.0609.2021-37909 TC4-DT钛合金是我国在"十五"期间研制的具有自主知识......
TC4钛合金薄板高能束焊接接头疲劳性能研究 巩水利1,陈俐1,李晓延2 (1.北京航空制造工程研究所,北京,100024;2.北京工业大学,材料学院,北京,100022) 摘要:对TC4钛合金薄板激光焊和电子束焊接头的疲劳性能进行了试验研究,测试了不同应力水平下的疲劳寿命.采用统计分析的方法研究了TC4钛合金薄板母材及其高能束流焊接接头的中值疲劳寿命.分析了焊接工艺条件对接头疲劳强度的影响.结果表明,在高应力水平时,TC4钛合金高能束流焊接接头的疲劳寿命低于母材的疲劳寿命,在低应力水平时,TC4钛合金高能束流焊接接头的疲劳寿命高于母材的疲劳寿命. 关键词:TC4钛合金; 激光焊; 电子束焊; 疲劳; [全文内容正在添加中] ......
文献标志码:A Influences of hot isostatic pressing on fatigue crack propagation of TC4 titanium alloy thin wall casting FENG Xin1, PENG shuang1, MA Ying-jie1, LEI Jia-feng1, WU...,即在高温长时间保温后,片状α相和集束宽化并长大,合金组织趋于均匀稳定. 图3 铸造TC4钛合金热等静压前后的微观组织 Fig. 3 Optical microstructures of TC4 alloy 表1所列为TC4热等静压前后的力学性能,可以看出,经热等静压后,TC4的屈服强度,抗拉强度和塑性均略有提高.这是由于热等静压后组织宽化,铸造残余应力得到不同程度的消除. 对两种组织......
