コーティング界面端部形状がはく離強度に及ぼす影響

概要

論文の詳細を見る
A thermal spraying process is useful to coat on substrates without any thermal damages. Therefore, it is possible to coat the high melting-point material, such as steels on the low melting point material, such as aluminum. However. it is generally difficult to improve the adherent strength between dissimilar materials. Because the stress concentration due to the material heterogeneity arises at the edge of coating interface. In this study, stress singularities at the intersection of free surfaces and the interface between steels and aluminum were investigated. It made clear that the no free-edge stress singularities existed below an apex angle of θ=20〜30°and between angles of about θ=90°and 150°. In the four-point bending test for the thermal sprayed aluminum with carbon steel and 13% chromium stainless steel, it was confirmed that the good adherent strength could be observed in order of θ=90°< 120°< 150°in case of no free-edge stress singulalities. This tendency of adherent strength was good agreement with the stress states around the edge of coating interface that were obtained by finite element analysis.
一般社団法人日本機械学会の論文
1999-09-25