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《Materials for Mechanical Engineering》 2013-05
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Determination of Solid Solution and Aging Process for a Second Generation Ni-based Single Crystal Superalloy

CHEN Bai-fan,LI Hui(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)  
The solid solution and aging process for a second generation Ni-based single crystal superalloy was investigated by the assistance of thermodynamic calculation,DSC curve and metallography.Results show that cast γ/γ′ eutectic in the superalloy was dissolved after step-wise solid solution at 1 315 ℃ for 4 h.After followed aging at 1 150 ℃×4 h,the size of cuboidal γ′ was 0.44 μm and its volume fraction was 62%.After the solid solution,first level aging and then the second aging at 870 ℃ for 24 h,this alloy showed excellent rupture property as good as that of foreign similar materials.
【Fund】: 国家重点基础研究资助项目(2010CB631201);; 国家自然科学基金资助项目(51171193)
【CateGory Index】: TG156.94
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