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范志东,李季,马翼超,张志博.温度对镍基单晶高温合金DD13拉伸行为的影响[J].稀有金属材料与工程(英文),2019,48(4):1288~1292.[fan zhidong,Liji,mayichao and zhangzhibo.Effect of Temperature on Tensile Behavior of Nickel-Based Single Crystal Superalloy DD13[J].Rare Metal Materials and Engineering,2019,48(4):1288~1292.]
Effect of Temperature on Tensile Behavior of Nickel-Based Single Crystal Superalloy DD13
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Received:April 10, 2017  Revised:June 27, 2017
DOI:
Key words: single crystal superalloy DD13  tension strength  plastic property  temperature  dislocations
Foundation item:51601145
Author NameAffiliation
fan zhidong,Liji,mayichao and zhangzhibo  
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Abstract:
      Tensile behaviors of a Nickel-based single crystal superalloy DD13 were studied from room temperature to 1050 °C in this study. Results show that both of yield strength and tension strength reached the peak value, namely 1108 MPa and 1340 MPa when testing temperature reached 700 °C. However, a converse trend was observed for the temperature dependence of plastic properties. Model of dislocation overcoming the precipitation strengthening phase (γ′) takes a key role on yield strength, which changes from shearing to climbing with the rising testing temperature. After the yield point, both of tension strength and plastic property are decided by that whether dislocations could slide smoothly or not. Relational twisting of partial dislocations with stacking fault from different slipping systems was observed at 700 °C.