【摘要】 采用选晶法制备不同结构的DD6单晶拉伸试样,通过对不同温度下[001]晶体取向的薄壁圆管与圆柱试棒拉伸试验,研究了DD6单晶试样结构对其热拉伸性能的影响。结果表明:在不同变形条件下,[001]取向孔内径Φ6.0mm的薄壁圆管极限强度比孔内径Φ7.0 mm高6.7%;而[001]取向薄壁圆管的拉伸性能比同条件圆柱试棒的拉伸性能高9.8%。试样结构对其性能的影响不明显,而试验温度与拉伸速率对其力学性能的影响较为显著。更多还原

【Abstract】 The DD6 single crystal test-samples were prepared by selected-crystal method,and the tensile properties of different structures such as thin-wall tube and circular test-bar with [001] orientation have been tested at high temperature,the effects of different structures on tensile properties were studied with DD6 single crystal specimen.The results show that the [001] orientation tensile properties of thin-wall tube with diameter 6.0 mm were 6.7% higher than that with diameter 7.0 mm under different condition,and the [001] orientation tensile properties of thin-wall tube were 9.8% higher than the circular test-bar in the same condition.There are no apparent effects of the samples’structure on tensile properties.However,the properties are more obviously affected by the temperature and tensilerate.更多还原