利用X射线四轴衍射仪测定了四点弯曲弹性加载条件下镍基单晶高温合金表层的宏观应变与应力,并与应变片及机械拉伸测定的数据进行了比较.分析了采用不同弹性常数及不同分峰方式处理得到的应力数据的差异.结果表明,实验数据重复性较好,实验误差为±30 MPa;XRD测量得出的应力应变结果与室温拉伸以及应变片测量结果符合较好;室温下合金基体相(γ)的弹性常数大于沉淀强化相(γ'),且基体相(γ)承受的应力大于沉淀强化相(γ').
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