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,2019,48(4):1288~1292.[fan zhidong,Liji,mayichao,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.]
温度对镍基单晶高温合金DD13拉伸行为的影响
投稿时间:2017-04-10  修订日期:2017-06-27
中文关键词:  单晶高温合金DD13  拉伸强度  塑性  位错组织  温度
基金项目:51601145
中文摘要:
      研究了新一代抗热腐蚀单晶高温合金DD13在不同温度下的拉伸行为,包括断口形貌、显微组织和位错组态分析等。结果表明:温度对合金的屈服强度和塑性影响明显。室温下,合金的屈服强度和抗拉强度分别为1059 MPa和1097 MPa;当试验温度在700°C时,合金的屈服强度和抗拉强度达到峰值,分别为1108 MPa和1340 MPa;而随着试验温度的继续升高,合金强度却呈明显的下降趋势,在试验温度为1050 °C时,屈服强度和抗拉强度分别为262 MPa和443 MPa。试验温度对合金塑性的影响则成相反趋势,合金在700 °C时表现出相对较差的塑性。分析发现,不同试验温度下,γ/γ′界面的共格错配度和位错克服强化相γ′方式的差异是影响合金屈服强度的主要因素,而合金达到屈服点后,位错是否发生交割缠绕现象是影响抗拉强度和塑性的关键因素。700 °C下,多处强化相γ′内发现不同滑移系层错交割、缠绕现象。
Effect of Temperature on Tensile Behavior of Nickel-Based Single Crystal Superalloy DD13
英文关键词:single crystal superalloy DD13  tension strength  plastic property  temperature  dislocations
英文摘要:
      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.
作者单位E-mail
范志东 西安热工研究院有限公司 fanzhidong@tpri.com.cn 
李季 西安热工研究院有限公司  
马翼超 西安热工研究院有限公司  
张志博 西安热工研究院有限公司  
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