工程科学学报2016，Vol.38Issue(2)：248-256,9.DOI:10.13374/j.issn2095-9389.2016.02.014
粉末高温合金FGH97疲劳裂纹扩展行为
Fatigue behavior of powder metallurgy superalloy FGH97
摘要
Abstract
The fatigue crack growth rates of powder metallurgy ( P/M) superalloy FGH97 with different grain sizes,γ'phase sizes and Hf contents were measured at a 650℃ high temperature condition and compared with those of FGH95 and FGH96 alloys. The fatigue fracture behavior characteristic of FGH97 alloy in each stage was analyzed by the quantitative analysis method. It is found that FGH97 alloy with coarser grains has a lower fatigue crack growth rate. Reasonable match of secondary and tertiary γ' phases and Hf addition can get a higher fatigue life. Compared with FGH95 and FGH96 alloys, FGH97 alloy has the highest fatigue cack intiation resistance and exihibits the lowest fatigue crack propagation rate at high temperature.关键词
镍基高温合金/粉末冶金/疲劳裂纹扩展速率/铪Key words
nickel base superalloys/powder metallurgy/fatigue crack growth rate/hafnium分类
矿业与冶金引用本文复制引用
佴启亮,董建新,张麦仓,郑磊,姚志浩..粉末高温合金FGH97疲劳裂纹扩展行为[J].工程科学学报,2016,38(2):248-256,9.基金项目
国家自然科学基金资助项目(51371023) （51371023）
