ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract It was found that duplex ferrite-martensite resulted in a significant increase in the fatigue threshold level together with an increase in yield strength. However, martensite cracking tends to induce cleavage cracks in ferrite grains under static and even cyclically repeated loads. Furthermore it causes a deterioration in (i) the tensile ductility, (ii) K1c and (iii) apparent resistance to fatigue crack propagation.This paper is concerned with finding the proper metallurgical control for providing desirable fracture properties. It was concluded that the improvement of resistance to fracture could be achieved by, (a) increasing the yield strength (hardness) of the martensite, (b) increasing and homogenizing the width of the martensite film formed between individual ferrite grains and (c) decreasing the ferrite grain size.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.1979.tb01338.x
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