Study on residual stress measurement on plasma sprayed coatings.
Study on residual stress measurement on plasma sprayed coatings.
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等离子喷涂涂层残余应力测量研究
DOI：
10.2207/qjjws.6.341
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
N. Tani
中科院分区：
文献类型：
--
作者：
Akira Noutomi;M. Kodama;Toyoaki Ono;Y. Inoue;M. Kawano;N. Tani
为了测量等离子喷涂涂层(Ni-Cr合金、ZrO_2-20%Y_2O_3)中的残余应力，作者首先测量了涂层材料的X射线应力系数K和杨氏模数E，然后用X射线衍射法研究了等离子喷涂条件对残余应力的影响。用应变片应力松弛法测量了应力值，并与X射线衍射法测得的应力值进行了比较。1)涂层的X射线应力系数K和杨氏模数E与块体材料相比很小。2)应力松弛法测得的Ni-Cr涂层的拉伸残余应力值比X射线衍射法测得的高约30%。3)涂层的残余应力既不受涂层厚度的影响，也不受喷涂距离的影响，但随着母材温度的升高，残余应力有减小的趋势。4)未发现ZrO2-20%Y_2O_3涂层的残余应力。
In order to measure residual stresses in plasma sprayed coatings (Ni-Cr alloy, ZrO2-20%Y2O3), the authors measured at first X-ray stress coefficient K and Young's modulus E of the coating material and then investigated the effect of plasma spraying conditions on the residual stresses by X-ray diffraction method.The stress relaxation method with a strain gauge was used also to measure stress values for comparison with the values measured by X-ray diffraction method.The results obtained are summarized as follows;1) X-ray stress coefficient K and Young's modulus E of coatings are very small in comparison with those of bulk materials.2) The tensile residual stress values on the Ni-Cr coatings measured by the stress relaxation method are about 30% higher than those measured by X-ray diffraction method.3) The residual stresses on the Ni-Cr coatings are affected neither by coating thickness nor by spraying distance, but are tend to decrease as the temperature of the base metal rises.4) No residual stresses on the ZrO2-20%Y2O3 coatings are recognized.