Fatigue behaviour of 42Cr Mo4 steel with PVD coatings

被引：34

作者：

Ferreira, JAM ^{[1
]}

Costa, JDM ^{[1
]}

Lapa, V ^{[1
]}

机构：

[1] POLYTECH INST LEIRIA,P-2400 LEIRIA,PORTUGAL

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 1997年 / 19卷 / 04期

关键词：

steel; surface treatments; plain specimens; S-N curves;

D O I：

10.1016/S0142-1123(97)00007-8

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents results concerning the fatigue strength for 42Cr Mo4 steel coated by physical vapour deposition (PVD). The raw material is compared with the material coated with W, WN, WTi and WTiN coatings. Fatigue tests were performed by three point bending under repeated loading cycle at room temperature using a sinusoidal wave loading with frequency of 25 Hz. From the experimental results, it can be concluded that the fatigue lifetime of specimens coated by PVD compared with uncoated specimens only increases for the region of low stress amplitudes and for the WTi film coating. For high stress amplitudes and for other coatings the life of coated specimens did not increase when compared with the uncoated specimens. In general crack initiation in the substrate near flaws in the coating film was observed. (C) 1997 Elsevier Science Ltd. All rights reserved.

引用

页码：293 / 299

页数：7

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