拉伸轴偏离角度对镍基模型单晶高温合金室温拉伸性能的误差影响分析

Analysis of the influence of the deviation angle of the tensile axis on the room temperature tensile properties of the nickel-based model single crystal superalloy

本文选用镍基模型单晶高温合金Ni-Al-Ru作为研究对象,综合利用SEM原位拉伸技术和EBSD技术,对样品拉伸轴偏离角度可能造成的室温拉伸性能的误差影响进行了分析。作者将实验上获得的屈服强度和抗拉强度归一化到[010]方向上,所得数据和原始数据相差较大,表明拉伸轴偏离[010]方向的角度是合金拉伸性能误差的重要来源。为了使误差<10%,需要将拉伸轴的偏离角度控制在8.8°以内。并且有必要进一步去寻找其它误差来源。

Nickel-based model single crystal superalloy Ni-Al-Ru was selected as the research object,and the influence of the error of tensile properties at room temperature caused by the deviation angle of the tensile axis was analyzed by using the in-situ tensile technique in SEM and EBSD technique.The yield strength and tensile strength obtained experimentally are normalized to the direction[010],and there is a large difference between the obtained data and the original data,indicating that the deviation angle of the tensile axis from the direction[010]is an important source of the error of the tensile properties of the alloy.In order to make the error less than 10%,the deviation angle of the tensile axis needs to be controlled within 8.8°.And it is necessary to look for other sources of error.