Effect Of Carburizing On Fatigue Behaviour In
A Type 316 Austenitic Stainless Steel
Author(s)
K. Tokaji & M. Akita
Abstract
The effect of carburizing on fatigue behaviour of smooth and notched specimens
and corrosion fatigue behaviour was studied in a type 316 austenitic stainless
steel. The fatigue strength of the smooth specimens was considerably increased
by carburizing and the specimens with a thick case exhibited longer fatigue lives
than the specimens with a thin case. The fatigue strength of the notched
specimens was also increased by carburizing and the extent of increase in fatigue
strength decreased with increasing stress concentration factor and then saturated.
A slight increase in notch sensitivity by carburizing was seen. In 3%NaCl
aqueous solution, the carburized smooth specimens showed no reduction in
fatigue strength, indicating the excellent corrosion resistance of the carburized
case.
Keywords: fatigue strength, notch effect, corrosion fatigue, carburizing, case
depth, austenitic stainless steel.
1 Introduction
In recent years, it has been strongly required to extend the service life of
machines and structures due to economic and environmental reasons. To achieve
this requirement, various surface engineering techniques have become major
interest because they can provide additional properties such as high strength,
thermal barrier, and corrosion and wear resistance.
Austenitic stainless steels have excellent corrosion resistance, but they posses
relatively low strength and poor wear resistance. Therefore, it is significant to
improve those properties by surface treatment. When surface-modified materials
are applied to load-bearing components, fatigue properties are critical. Until
Keywords
fatigue strength, notch effect, corrosion fatigue, carburizing, case
depth, austenitic stainless steel.
Related Book
Other papers in this volume
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