ISSN:
1662-8985
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:
Uniaxial ratchetting-fatigue interaction of tempered 42CrMo alloy steel was observed byvarious cyclic stressing tests at room temperature. The ratchetting deformation and low cycle fatigue(LCF) property of the material as well as their interaction occurred in cyclic stressing were discussed.It is shown that progressive ratchetting deformation causes the decrease of fatigue life, and the fatiguelife of the material depends greatly upon the applied mean stress, stress amplitude, maximum stressand stress ratio. Since tempered 42CrMo steel presents significant cyclic softening feature, a tertiaryratchetting is observed. Based on the experimental results, a simple and reasonable failure modelconvenient to engineering application was constructed to predict the fatigue life of the material inuniaxial cyclic stressing. The basic variables of the model are maximum stress and stress ratio, andthe effect of cyclic softening feature on the ratcheting-fatigue interaction is also included in the modelby introducing a new variable. It is shown that the predicted lives are in fairly good agreement withthe experimental ones
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.115.pdf
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