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HIGH TEMPERATURE FATIGUE BEHAVIOUR OF A DIRECTIONALLY SOLIDIFIED COBALT-BASE SUPERALLOY 被引量:4
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作者 W.H.JIANG x.d.yao +1 位作者 H.R.GUAN Z.Q.HU 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1998年第2期111-115,共5页
The high temperature high cycle fatigue behaviour of a directionally solidified Co-base superalloy was investigated. The alloy has saperior fatigue resistance at 900℃ and its fatigue strength is up to 295MPa. Its σ-... The high temperature high cycle fatigue behaviour of a directionally solidified Co-base superalloy was investigated. The alloy has saperior fatigue resistance at 900℃ and its fatigue strength is up to 295MPa. Its σ-Nf curve is characterized by three distinct zones. The stronger dependence of Nf on or in the high .and low stress zones results from multiple fatigue crock initiation sites produced by high stress and oxidation effect in a prolonged exposure, respectively. 展开更多
关键词 directional solidification Co-base superalloy fatigue fracture
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