Fracture Mechanism Of Shot-peened Maraging Steel
In Long-life Region
Author(s)
T. Nagano, M. Moriyama & N. Kawagoishi
Abstract
Fracture mechanism of shot-peened maraging
steel in long-life region
T. ~agano', M. ~ o r i ~ a r n a ' & N. ICawagoishi2
I Miyakonojyo National College of Technology, Miyakonojyo, Japan
2 Faculty of Engineering, Kagoshima University, Kagoshima, Japan
Abstract
The influence of reversion austenite on the fatigue strength of shot-peened
maraging steel was investigated under rotating bending fatigue in order to
achieve further improvement of fatigue strength in long life region. Fracture
origin changed from the surface to the internal of a specimen with decrease in
stress level. Fatigue strength at low stress levels, where internal fracture
occurred, increased by formation of reversion austenite. This is mainly caused by
the suppression effects of reversion austenite on the growth of a small crack and
the intergranular crack. By formation of reversion austenite, a clear fish-eye was
observed.
1. Introduction
Recently, demands of weight reduction and long-term service for machines and
components
Keywords
Related Book
Other papers in this volume
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