• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effect of Pt-aluminide bond coat on tensile and creep behavior of a nickel-base single crystal superalloy
【24h】

Effect of Pt-aluminide bond coat on tensile and creep behavior of a nickel-base single crystal superalloy

机译：铂铝键合涂层对镍基单晶高温合金拉伸和蠕变行为的影响

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 effect of Pt-aluminide bond coat on the mechanical properties, namely tensile and creep, of a Ni-base single crystal superalloy has been investigated. Tensile properties of both uncoated and bond coated specimens were evaluated in the temperature range of room temperature (RT)-1100 ℃. Creep testing was carried out using four combinations of temperature and stress, viz. 850 ℃/500 MPa, 982 ℃/240 MPa, 1038 ℃/138 MPa and 1100 ℃/90 MPa. By and large, the presence of bond coat reduced the tensile strength of the superalloy at all temperatures. However, the coated alloy exhibited a higher ductility than the uncoated alloy in the above temperature range. The lowering of strength in the coated alloy can be explained in terms of the significantly lower strength of the coating as compared to that of the substrate, which caused a decrease in the strength of the coating-substrate composite structure. The higher ductility of the coated alloy, especially at elevated temperatures, can be attributed to the surface protection provided by the oxidation resistant bond coat to the substrate. The creep properties (strain-to-fracture and creep life) of the coated alloy were somewhat inferior to those of the uncoated alloy at all test temperatures. This can be ascribed to the low strength of the bond coat at high temperatures and also to the microstructural changes that took place in and near the coating during the creep test.
机译：研究了铂铝键合涂层对镍基单晶高温合金力学性能（即拉伸性能和蠕变性能）的影响。在室温（RT）-1100℃的温度范围内评估了未涂层和粘合涂层样品的拉伸性能。使用温度和应力的四种组合进行蠕变测试，即。 850℃/ 500 MPa，982℃/ 240 MPa，1038℃/ 138 MPa和1100℃/ 90 MPa。总的来说，粘结涂层的存在降低了在所有温度下超合金的拉伸强度。但是，在上述温度范围内，涂层合金比未涂层合金具有更高的延展性。涂层合金强度的降低可以用涂层的强度明显低于基体的强度来解释，这导致涂层-基体复合结构的强度降低。涂层合金的较高的延展性，特别是在高温下，可归因于由抗氧化粘结涂层提供给基材的表面保护。在所有测试温度下，涂层合金的蠕变性能（断裂伸长率和蠕变寿命）都比未涂层合金低。这可以归因于在高温下粘结层的低强度，还可以归因于蠕变测试期间在涂层内部和附近发生的微观结构变化。

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