TY - JOUR
T1 - Effects of fine particle peening on torsional fatigue strength of a trip-aided bainitic ferrite steel
AU - Mizuno, Yuta
AU - Hojo, Tomohiko
AU - Sugimoto, Koh Ichi
N1 - Publisher Copyright:
© 2015 The Society of Materials Science, Japan.
PY - 2015
Y1 - 2015
N2 - The effects of fine particle peening (FPP) on the torsional fatigue properties were investigated in the case of a transformation-induced plasticity (TRIP)-aided bainitic ferrite (TBF) steel that has potential for use in precision gears. FPP resulted in a significant increase in the torsional fatigue limit of the TBF steel, compared with that of a quenched and tempered SNCM420 steel. An increase in the torsional fatigue limit was larger than that in the rotating bending fatigue limit. In addition, the crack growth rate and the threshold stress intensity range of this steel were lower and higher, respectively, than those of its SNCM420 counterpart. These differences resulted from the TBF steel having a higher (1) Vickers hardness, (2) compressive residual stress, and (3) volume fraction of untransformed retained austenite in the surface hardened layer, which suppressed crack initiation and extension.
AB - The effects of fine particle peening (FPP) on the torsional fatigue properties were investigated in the case of a transformation-induced plasticity (TRIP)-aided bainitic ferrite (TBF) steel that has potential for use in precision gears. FPP resulted in a significant increase in the torsional fatigue limit of the TBF steel, compared with that of a quenched and tempered SNCM420 steel. An increase in the torsional fatigue limit was larger than that in the rotating bending fatigue limit. In addition, the crack growth rate and the threshold stress intensity range of this steel were lower and higher, respectively, than those of its SNCM420 counterpart. These differences resulted from the TBF steel having a higher (1) Vickers hardness, (2) compressive residual stress, and (3) volume fraction of untransformed retained austenite in the surface hardened layer, which suppressed crack initiation and extension.
KW - Fine particle peening
KW - Hardness
KW - Residual stress
KW - Retained austenite
KW - Strain-induced transformation
KW - TRIP-aided bainitic ferrite steel
KW - Torsion fatigue strength
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U2 - 10.2472/jsms.64.853
DO - 10.2472/jsms.64.853
M3 - Article
AN - SCOPUS:84948979873
VL - 64
SP - 853
EP - 858
JO - Zairyo/Journal of the Society of Materials Science, Japan
JF - Zairyo/Journal of the Society of Materials Science, Japan
SN - 0514-5163
IS - 11
ER -