THERMO-MECHANICAL FATIGUE CRACK GROWTH MODELLING IN A NI-BASED SUPERALLOY SUBJECTED TO SUSTAINED LOAD

被引：0
|
作者：
Storgards, Erik [1 ]
Simonsson, Kjell [1 ]
Sjostrom, Soren [1 ]
Moverare, Johan [2 ]
机构：
[1] Linkoping Univ, Div Solid Mech, SE-58183 Linkoping, Sweden
[2] Linkoping Univ, Div Engn Mat, SE-58183 Linkoping, Sweden
来源：
PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2015, VOL 7A | 2015年
关键词：
HOLD-TIME; INCONEL; 718; DYNAMIC EMBRITTLEMENT; BEHAVIOR; ALLOY; PROPAGATION; FRACTURE;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Thermo-mechanical fatigue (TMF) crack growth modelling as been conducted on Inconel 718 with dwell time at maximum;ad. A history dependent damage model taking dwell damage uto account, developed under isothermal conditions, has been xtended for TMF conditions. Parameter determination for the lodel is carried out on isothermal load controlled tests at 55050 C for surface cracks, which later have been used to extrapole parameters used for TMF crack growth. Further, validation 'the developed model is conducted on a notched specimen sub?cted to strain control at 50-550 C. Satisfying results are gained 'ithin reasonable scatter level compared for test and simulated umber of cycles to failure.
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页数：10
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