ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
For attaining optimum fatigue resistance of PM steels, high density levels are necessary.In this work, sintered steels Fe-1.5%Mo-0.6%C and Fe-1.5%Cr-0.2%Mo-0.6%C were producedwith density levels of 7.1 to 7.6 g.cm-3. Ultrasonic fatigue testing with 20 kHz was performed inpush- pull mode up to 10E9 cycles. It was shown that the fatigue endurance strength is stronglyimproved by higher density levels, but also higher sintering temperatures are beneficial. The Cr-Mosteels proved to be superior to the plain Mo alloyed, due to a more favourable as-sintered matrixmicrostructure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.689.pdf