置氢Ti-55钛合金气胀成形模拟及试验研究

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英文篇名：Simulation and experimental study on gas bulging of hydrogenated Ti-55 titanium alloy 作者：陈楠楠 ; 李细锋 ; 孙宏宇 ; 高鹏 ; 叶福田 英文作者：CHEN Nan-nan;LI Xi-feng;SUN Hong-yu;GAO Peng;YE Fu-tian; 关键词：置氢Ti-55 ; 气胀成形 ; 数值模拟 ; 超塑性成形 英文关键词：hydrogenated Ti-55;;superplastic gas bulging;;numerical simulation;;superplastic forming 中文刊名：MJJS 英文刊名：Die and Mould Technology 机构：上海交通大学塑性成形技术与装备研究院;北京卫星制造厂有限公司;航天材料及工艺研究所;东莞市横沥模具科技产业发展有限公司; 出版日期：2019-01-25 出版单位：模具技术 年：2019 期：No.217 基金：国家自然科学基金项目(51475295);Ti-55高温钛合金超塑变形/同步动态扩散连接的界面机理研究 语种：中文; 页：MJJS201901001 页数：5 CN：01 ISSN：31-1297/TG 分类号：5-9

摘要

采用有限元分析软件MSC.MARC,对不同氢质量分数的Ti-55钛合金进行恒压超塑气胀成形数值模拟。分析不同胀形压力条件下零件的胀形高度分布规律,确定合理的胀形压力。模拟结果表明,在相同的成形时间内,零件的胀形高度随胀形压力的增加而增加。在胀形压力为4MPa时,氢质量分数为0.3%的Ti-55钛合金的胀形高度明显高于未置氢合金和氢质量分数为0.1%的Ti-55钛合金,高径比达到1.56,表现出良好的塑性变形能力。根据数值模拟结果,选取胀形压力为4 MPa下进行超塑气胀成形试验,试验与模拟的胀形高度误差均在9%以内,验证了数值模拟结果的可靠性。
        Finite element analysis software MSC.MARC was used to numerically simulate the superplastic gas bulging forming behavior of hydrogenated Ti-55 titanium alloys with different hydrogen mass fraction under constant pressure.The effect of bulging pressure on height distribution of formed parts was analyzed.Then appropriate bulging pressure was chosen.The simulation results show that the bulging height of formed part increases with the increase of bulging pressure during same forming period.When the bulging pressure is 4MPa,the bulging height of Ti-55 with hydrogen mass fraction 0.3%is much higher than that of as-received and hydrogen mass fraction 0.1% Ti-55 titanium alloy,and the ratio of height to radius reaches 1.56,which indicates an excellent deformation ability.According to numerical simulation results,the superplastic gas bulging experiments were conducted under bulging pressure of 4MPa.All bulging height deviations between experiment and simulation are less than 9%,which verifies the high reliability of numerical simulation results.

引文

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