• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Research Innovations >Microstructure and mechanical properties of directionally solidified and heat treated Nb‐14Si‐24Ti‐2Cr alloy
【24h】

Microstructure and mechanical properties of directionally solidified and heat treated Nb‐14Si‐24Ti‐2Cr alloy

机译：定向凝固和热处理的Nb-14Si-24Ti-2Cr合金的组织和力学性能

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

In this work, the directional solidification of an Nb‐14Si‐24Ti‐2Cr alloy (at-%) was performed at 1900°C with withdrawal rates of 1·2, 6 and 18 mm min−1, and the alloy was then heat treated (HT) at 1450°C for 100 h. The microstructures and mechanical properties of the directionally solidified and HT alloy were investigated. The phases present in the sample were confirmed to be NbSS dendrites, lath-like Nb3Si, eutectic NbSS+Nb3Si and Ti enriched areas. As the withdrawal rate increased, the effects of directional solidification became more evident, and the microstructure became more refined. After the heat treatment, the microstructure was characterised by NbSS dendrites, residual Nb3Si and lamellar eutectic NbSS+Nb3Si, which was decomposed from the lath-like Nb3Si. An increase in the withdrawal rate resulted in a decrease in the room temperature fracture toughness of the HT alloy. However, the room temperature compressive strength of the HT alloy increased to 1593·9 MPa with increasing withdrawal rate, which was twice the value of the compressive strength before heat treatment.
机译：在这项工作中，Nb-14Si-24Ti-2Cr合金（at-％）的定向凝固是在1900°C时以1·2、6和18 mm min-1的抽出速率进行的，然后加热合金在1450°C下处理（HT）100小时。研究了定向凝固和HT合金的组织和力学性能。样品中存在的相被确认为NbSS枝晶，板条状Nb3Si，共晶NbSS + Nb3Si和Ti富集区。随着退出速率的增加，定向凝固的效果变得更加明显，并且微观组织变得更加细化。热处理后，显微组织的特征是NbSS树枝状晶体，残留的Nb3Si和层状共晶NbSS + Nb3Si，它们从板条状Nb3Si分解。撤回速率的增加导致HT合金的室温断裂韧性降低。然而，随着回撤率的提高，HT合金的室温抗压强度增加到1593·9 MPa，是热处理前抗压强度值的两倍。

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