Improvement of fatigue strength of maraging steel by nitriding

Norio Kawagoishi, Kazunori Fukada, Kazuhiro Morino, Quing Chen, Eiji Kondo

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Rotating bending fatigue tests were carried out to investigate the influence of radical nitriding on the surface integrity and the fatigue strength for a maraging steel. Fatigue strength increased by nitriding. Although the initiation site of fracture was the surface in the aged steel, it was the specimen suface at high stress levels and the interior at low stress levels in the nitrided steel. The main reason for the surface fracture was the surface embrittlement and the one for the interior fracture was the surfce hardening due to nitriding. As the results, S-N curves of the nitrided maraging steel showed a double staged curve.

Original languageEnglish
Pages (from-to)314-320
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Issue number654
Publication statusPublished - 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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