TY - GEN
T1 - Threshold of shear-mode fatigue crack growth in bearing steel
AU - Matsunaga, Hisao
AU - Muramoto, Satoshi
AU - Endo, Masahiro
PY - 2008/12/1
Y1 - 2008/12/1
N2 - Semi-elliptical shear-mode fatigue cracks were studied in SAE52100 bearing steel loaded with fully-reversed cyclic torsion combined with a static axial compressive stress. Non-propagating cracks smaller than 1 mm in length were obtained in the following two ways; (i) decreasing stress amplitude tests using notched specimens, and (ii) constant stress amplitude tests using smooth specimens. The shape and dimensions of the non-propagating cracks were investigated by a successive polishing of the specimen surface, and the threshold stress intensity factor ranges, δK IIth and δK IIIth, were estimated. The threshold values decreased with a decrease in crack size. There was no significant difference between δK IIth and δK IIIth. Wear on the crack surfaces during crack-growth was inferred by a change in microstructure.
AB - Semi-elliptical shear-mode fatigue cracks were studied in SAE52100 bearing steel loaded with fully-reversed cyclic torsion combined with a static axial compressive stress. Non-propagating cracks smaller than 1 mm in length were obtained in the following two ways; (i) decreasing stress amplitude tests using notched specimens, and (ii) constant stress amplitude tests using smooth specimens. The shape and dimensions of the non-propagating cracks were investigated by a successive polishing of the specimen surface, and the threshold stress intensity factor ranges, δK IIth and δK IIIth, were estimated. The threshold values decreased with a decrease in crack size. There was no significant difference between δK IIth and δK IIIth. Wear on the crack surfaces during crack-growth was inferred by a change in microstructure.
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M3 - Conference contribution
AN - SCOPUS:84866103165
SN - 9781617823190
T3 - 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures
SP - 993
EP - 999
BT - 17th European Conference on Fracture 2008
T2 - 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17
Y2 - 2 September 2008 through 5 September 2008
ER -