The effects of Ta on the stress rupture properties and microstructural stability of a novel Ni-base superalloy for land-based high temperature applications
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- 作者：Liang Zhenga ; b ; c ; leon.zhengliang@gmail.com" class="auth_mail ; liang.zheng@materials.ox.ac.uk" class="auth_mail ; Guoqing Zhanga ; Tung L. Leec ; Michael J. Gorleyb ; Yue Wanga ; Chengbo Xiaoa ; Zhou Lia
- 关键词：Superalloy ; High W content ; Tantalum ; Stress-rupture ; Microstructural stability ; Carbide
- 刊名：Materials and Design
- 出版年：September 2014
- 年：2014
- 卷：61
- 期：Complete
- 页码：61-69
- 全文大小：5268 K
文摘
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An equiaxed superalloy has high rupture life equivalent to single crystal alloy DD3.
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Low Cr and high W superalloys possess good microstructrual stability at 850–1100 °C.
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Tantalum promotes, strengthens and stabilizes the eutectic 纬′ and MC carbides.
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Excessive Ta leads to form harmful abnormal primary 伪 and plate-like M6C phases.
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Proper Ta can improve the stress rupture life at intermediate and high temperatures.