...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Microstructure and strength of brazed joints of Ti_3Al-base alloy with TiZrNiCu filler metal
【24h】

Microstructure and strength of brazed joints of Ti_3Al-base alloy with TiZrNiCu filler metal

机译：Ti_3Al基合金与TiZrNiCu钎料钎焊接头的组织和强度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Brazing of Ti_3Al alloys with the filler metal TiZrNiCu was carried out at 1173-1373 K for 60-1200 s. The relationship of brazing parameters and shear strength of the joints was discussed and the optimum brazing parameters were obtained. When products are brazed, the optimum brazing parameters are as follows: brazing temperature is 1273-1323 K, brazing time is 250-300 s. The maximum shear strength of the joint is 250-260 MPa. Four kinds of reaction products were observed to have formed during the brazing of Ti_3Al alloys with the filler metal TiZrNiCu, namely Ti_2Ni + TiCu intermetallic compounds formed close to the Ti_3Al alloy. TiNi_2Cu intermetallic compounds layer formed between Ti_2Ni + TiCu intermetallic compounds and the filler metal and a Ti[s,s] (here s,s means super saturation) solid solution formed with the dispersed TiNi_2Cu in the middle of the joint. The interfacial structure of brazed Ti_3Al alloys joints with the filler metal TiZrNiCu is Ti_3Al/Ti_2Ni + TiCu/TiNi_2Cu/Ti[s,s] solid solution+ TiNi_2Cu/TiNi_2Cu/TiCu + Ti_2Ni/Ti_3Al and this structure will not change with brazing time once it forms. The formation of over many intermetallic compounds Ti_2Ni + TiCu + TiNi_2Cu results in embrittlement of the joint and poor joint properties. The thickness of Ti_2Ni + TiCu + TiNi_2Cu intermetallic compounds increases with brazing time according to a parabolic law. The activation energy Q and the growth velocity K_0 of the reaction layer Ti_2Ni + TiCu + TiNi_2Cu in the brazed joints of Ti_3Al alloys with the filler metal TiZrNiCu are 261 kJ/mol and 0.0434 mm~2/s, respectively and the growth formula was y~2 = 0.0434 exp(-31392.83/T)t. Careful control of the growth of the reaction layer Ti_2Ni + TiCu + TiNi_2Cu can influence the final joint strength.
机译：Ti_3Al合金与填充金属TiZrNiCu的钎焊在1173-1373 K下进行60-1200 s。讨论了钎焊参数与接头抗剪强度之间的关系，得到了最佳的钎焊参数。钎焊产品时，最佳钎焊参数如下：钎焊温度为1273-1323 K，钎焊时间为250-300 s。接头的最大剪切强度为250-260 MPa。观察到在用填充金属TiZrNiCu钎焊Ti_3Al合金时形成了四种反应产物，即靠近Ti_3Al合金形成了Ti_2Ni + TiCu金属间化合物。在Ti_2Ni + TiCu金属间化合物与填充金属之间形成TiNi_2Cu金属间化合物层，并在接头中间形成分散有TiNi_2Cu的Ti [s，s]（此处s，s表示超饱和）固溶体。与钎料TiZrNiCu钎焊的Ti_3Al合金接头的界面结构为Ti_3Al / Ti_2Ni + TiCu / TiNi_2Cu / Ti [s，s]固溶体+ TiNi_2Cu / TiNi_2Cu / TiCu + Ti_2Ni / Ti_3Al，一旦钎焊时间该结构就不会改变形式。过多的金属间化合物Ti_2Ni + TiCu + TiNi_2Cu的形成导致接头的脆化和不良的接头性能。根据抛物线定律，Ti_2Ni + TiCu + TiNi_2Cu金属间化合物的厚度随钎焊时间而增加。 Ti_3Al合金与填充金属TiZrNiCu钎焊接头中反应层Ti_2Ni + TiCu + TiNi_2Cu的活化能Q和生长速度K_0分别为261 kJ / mol和0.0434 mm〜2 / s，生长公式为y 〜2 = 0.0434 exp（-31392.83 / T）t。仔细控制反应层Ti_2Ni + TiCu + TiNi_2Cu的生长会影响最终的接头强度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号