高温下DD6单晶气冷叶片模拟试样拉伸性能试验

何爱杰; 李世峰; 罗秋生; 曾军; 马健; 吴长波

高温下DD6单晶气冷叶片模拟试样拉伸性能试验

中国航空工业集团公司中国燃气涡轮研究院涡轮技术研究室, 成都 610500

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出版历程
- 收稿日期: 2011-04-13
- 修回日期: 2011-08-06
- 刊出日期: 2012-02-28

Experimental investigation on tension behavior of DD6 single crystal thin-walled cylindrical specimen under high temperature

Research Centre of Turbine Technology, China Gas Turbine Establishment, Aviation Industry Corporation of China, Chengdu 610500, China

摘要

摘要: 通过选晶法制备DD6单晶薄壁圆管模拟试样,对850℃和980℃两种温度下[001]晶体取向含与不含气膜孔的薄壁试管进行拉伸性能试验研究.结果表明:在850℃条件下,[001]取向含气膜孔的拉伸性能比[001]取向不含气膜孔的拉伸性能降低10.5%;在980℃条件下,[001]取向含气膜孔的拉伸性能与[001]取向不含气膜孔的拉伸性能水平相当,这表明温度越高,气膜孔对薄壁件拉伸性能的影响越不显著;但在980℃ 条件下,[001]取向通气状态的拉伸强度比不通气状态下的拉伸强度提高16%.同时,发现圆管表面状态及通气状态是影响单晶薄壁试样高温性能的重要因素,特别是通气状态的存在显著提高了其高温力学性能.
- DD6单晶 /
- 薄壁圆管 /
- 气膜孔 /
- 通气状态 /
- 拉伸性能
Abstract: The thin-walled simulative specimens of DD6 single crystal superalloy were prepared with selected-crystal method.The tensile properties of thin-walled tube with [001] crystallographic orientations were investigated at 850℃ and 980℃,and one half of the specimens were plates with film cooling holes.The results show that the [001] orientation tensile properties with film cooling holes are reduced by 10.5% than without film cooling holes at 850℃,and the [001] orientation tensile properties with film cooling holes correspond with those without film cooling holes at 980℃.It indicates that when the temperature is higher,the effect to tensile properties is more significant.However,the [001] orientation tensile properties with airing condition are increased by 16% than those without airing condition at 980℃.Therefore,the surface state and airing condition play a main role to affect the properties of single crystal thin-walled tube.Especially,it is the airing condition that the mechanical properties have obviously improved.
- DD6 single crystal /
- thin-walled tube /
- film cooling holes /
- airing condition /
- tensile properties

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参考文献(13)

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