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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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K417铸造镍基高温合金热机械疲劳行为的研究
, PP. 267-271
Keywords: 铸造高温合金,热机械疲劳,同相,反相
Abstract:
研究了K417合金在400-850℃同相(IP)和反相(OP)的热机械疲劳(TMF)行为,并且与850℃等温疲劳(IF)性能进行了比较结果发现K417合金IF和TMF都具有循环硬化特征,IF的循环硬化能力比TMF的要高与等温疲劳寿命相比较,在相同机械应变幅下,TMF的寿命降低,而且同相(IP)的寿命比反相(OP)的寿命更低.SEM断口及断裂纵向剖面检查发现,同相TMF的沿晶开裂是导致其疲劳寿命比反相TMF低的主要原因.
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