複合表面改質材の表面メゾ傾斜機能化による高疲労信頼性の発現

概要

論文の詳細を見る
An experimental study was carried out with the aim of development of a fatigue reliability design method for surface modified materials using the smooth specimens SMn 435, with three kinds of surface treatment, ;that is, TiCN coating by PVD method, gas-nitriding and duplex treatment with the gas-nitriding followed by the TiCN coating. Fatigue strength of the surface modified specimens was improved as compared with untreated specimen. The highest fatigue strength was the duplex surface modified specimen, followed by the gas-nitriding one and the lowest was the TiCN coating one. This tendency was obvious at the region of high stress amplitude and disappeared at low stress amplitude region. The difference in fatigue strength between the duplex surface modified specimen and the TiCN coating one was discussed cracking in TiCN coating. It was found that cracking in TiCN coating film was attributable to cyclic plastic deformation in the subsurface region.
一般社団法人日本機械学会の論文
2000-04-25