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Fracture Features of Single Crystal Superalloys
Author(s): 
Pages: 225-230
Year: Issue:  4
Journal: Failire Analysis and Prevention

Abstract: 对单晶高温合金高温拉伸、低周疲劳、高周疲劳和持久断裂特征进行试验研究.结果表明:单晶高温合金高温拉伸断口具有类解理断裂与韧窝断裂的混合特征,断裂机制为中心微孔聚集型断裂.低周疲劳断裂在高应变幅下为多疲劳源,裂纹扩展初期断口与主应力方向垂直,随后疲劳裂纹沿特定晶体学平面扩展;在低应变幅下为单疲劳源,疲劳裂纹沿特定晶体学平面扩展.高周疲劳断裂为单疲劳源,在大应力下断口由多个相交的特定晶体学平面组成,应...
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