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材料研究学报  2012, Vol. 26 Issue (4): 361-366    
  研究论文 本期目录 | 过刊浏览 |
Ti/Al比对镍基定向高温合金组织和性能的影响
韩汾汾, 李辉, 楼琅洪
中国科学院金属研究所高温合金研究部 沈阳 110016
Effect of Ti/Al Ratio on the Microstructure and Creep Property in a Directionally Solidified Ni-base Superalloy
HAN Fenfen LI Hui LOU Langhong
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
引用本文:

韩汾汾 李 辉 楼琅洪. Ti/Al比对镍基定向高温合金组织和性能的影响[J]. 材料研究学报, 2012, 26(4): 361-366.
. Effect of Ti/Al Ratio on the Microstructure and Creep Property in a Directionally Solidified Ni-base Superalloy[J]. Chin J Mater Res, 2012, 26(4): 361-366.

全文: PDF(901 KB)  
摘要: 用金相显微镜和扫描电镜对镍基定向高温合金铸态及热处理态的组织进行观察和分析, 用透射电镜的EDS对合金元素在γ和γ'两相中的分配比进行测试和分析,研究了在Al+Ti质量总和相同条件下, Ti/Al比对其微观组织及持久性能的影响。结果表明: 随着Ti/Al比的增加, 合金铸态组织中共晶含量显著增加, 共晶周围有η相生成;合金初熔温度降低;相同热处理条件下, γ'相的尺寸增加, 立方度降低;合金持久性能变化不大。
关键词 金属材料镍基定向高温合金Ti/Al比微观组织持久性能    
Abstract:The microstructure and creep property of a directionally solidified nickel base superalloy with different Ti/Al ratio was observed and the as-cast and heat treated microstructure was analyzed by OM and SEM. Partition ratio of alloy element in γ and γ' phase was measured by TEM equipped with EDS. The influences of Ti/Al ratio on the microstructure and the creep property were investigated. The results show that the amount of eutectics in the as-cast samples increased obviously and η phase formed around the eutectic with the increasing of Ti/Al ratio; meantime, the incipient melting temperature decreased and the size of γ' phase in the heated samples increased and the morphology turned irregular. No obvious effect of Ti/Al ratio was found on the creep properties of the present experiment alloy.
Key wordsmetallic materials    directionally solidified Ni-base superalloy    Ti/Al ratio    microstructure    creep property
收稿日期: 2012-02-23     
ZTFLH: 

TG142

 
基金资助:

国家重点基础研究发展计划2010CB631201和国家自然科学基金51171193资助项目。

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