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:
Stainless steels are attractive materials for many applications (e.g. petrochemical industry, chemical and nuclear plants, marine environment, desalination, etc.). They are sometimes characterized by considerable difficulties from the manufacturing point of view, and powder metallurgy offers an excellent alternative to produce these steels. Sintered stainless steels are characterized by the presence of micropores and by different microstructures that depend on the sintering procedures (powders, sintering temperature and duration, etc.).In the present work we consider five different sintered stainless steels, characterized by different microstructures: fully ferritic, fully austenitic, ferritic–austenitic, ferritic–austenitic–martensitic (two different volume fractions). Their fatigue crack propagation resistance is investigated by means of fatigue crack growth tests according to ASTM E647 standard, considering a stress ratio value (R=Kmin/Kmax) equal to 0.1. Crack propagation micromechanisms are examined through both fracture surface analyses (by means of a scanning electron microscope) and crack path profile analyses (by means of an optical microscope).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.2005.00836.x
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