Stability of Residual stresses Created by Shot Peening of Pearlitic Steel and Their Influence on Fatigue Behaviour
Paper i proceeding, 2010

In this study the effect of shot peening on the fatigue lifetime of a near pearlitic microalloyed steel was investigated. The fatigue tests were run in strain control with parallel recording of stress relaxation and recovery of the work hardened surface zone at different total strain amplitudes exerted to the test specimens. These relaxation processes were followed versus cycle number up to half of the fatigue life time (N=Nf/2). Provided that the global plastic strain amplitude is lower than about 0.08 % a noticeable increase in life time is seen. Lower plastic strain amplitude increases the life time. At small plastic strain amplitudes it was found that the fatigue life time could be increased more than tenfold by the shot peening process.

Relaxation

Fatigue

Residual stress

Work hardening

Micro alloyed steel

Strain control

Författare

Kamellia Dalaei

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Birger Karlsson

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Lars-Erik Svensson

Chalmers, Material- och tillverkningsteknik

10th International Fatigue Congress, FATIGUE 2010; Prague; Czech Republic; 6 June 2010 through 11 June 2010

1877-7058 (eISSN)

Vol. 2 613-622

Ämneskategorier

Materialteknik

Annan materialteknik

DOI

10.1016/j.proeng.2010.03.066