• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Solutioning on the Dissolution and Coarsening of gamma' Precipitates in a Nickel-Based Superalloy
【24h】

Effects of Solutioning on the Dissolution and Coarsening of gamma' Precipitates in a Nickel-Based Superalloy

机译：固溶对镍基高温合金中γ'沉淀的溶解和粗化的影响

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

The dissolution and the coarsening of the gamma' precipitates in a nickel-based superalloy GTD-111 solutionized under various solution heat treatment conditions were investigated. The gamma' solvus temperature for the GTD-111 superalloy was about 1180.79 A degrees C obtained by differential scanning calorimetry test. The dissolution and the coarsening of gamma' in the dendrite core were simultaneously observed, but the gamma' precipitates in the interdendritics only occurred to coarsen under the condition of 1125 A degrees C/2 h. The gamma' dissolution, including dendrite core and interdendritics, gradually played a dominant role in the competition between the dissolution and the coarsening of gamma' during the solutioning with the increase of solution temperature and holding time, indicating that the elastic strain field of the alloy gradually reduced. The solution condition of 1225 A degrees C/6 h or 1250 A degrees C/2 h was the optimal solutioning schedule than the other schedules. For a lower solution temperature, the volume fraction of primary gamma' precipitates can faster reach its equilibrium value which is larger than that for a higher solution temperature. With the increase of holding time, the gamma' dissolution rate continuously decreased, and the dissolution activation energy of gamma' gradually increased.
机译：研究了在各种固溶热处理条件下固溶的镍基高温合金GTD-111中γ沉淀的溶解和粗化。通过差示扫描量热法测试获得的GTD-111高温合金的γ'固溶温度为约1180.79℃。同时观察到了γ'在树枝状晶体核中的溶解和粗化，但仅在1125 A摄氏度/ 2 h的条件下，枝晶间的γ'沉淀才发生粗化。随着固溶温度和保温时间的增加，固溶过程中γ′的溶解（包括树枝状晶核和树枝状晶）在γ′的溶解和粗化之间的竞争中逐渐发挥主导作用，这表明合金的弹性应变场逐渐减少。与其他计划相比，1225 A摄氏度/ 6 h或1250 A摄氏度/ 2 h的求解条件是最佳求解时间表。对于较低的溶液温度，初级γ′沉淀的体积分数可以更快地达到其平衡值，该平衡值大于较高的溶液温度的平衡值。随着保持时间的增加，γ'的溶解速率不断降低，γ'的溶解活化能逐渐增加。

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