TY - JOUR
T1 - An experimental investigation on fatigue crack growth of AL6XN stainless steel
AU - Kalnaus, S.
AU - Fan, F.
AU - Vasudevan, A. K.
AU - Jiang, Y.
PY - 2008/5
Y1 - 2008/5
N2 - The crack growth behavior of AL6XN stainless steel was experimentally investigated using round compact tension (CT) specimens. The influences of the R-ratio (the ratio of the minimum load over the maximum applied load in a cycle), the tensile and compressive overloads, and the loading sequence on crack growth were studied in detail. The results from the constant-amplitude experiments show a sensitivity of the crack growth rate to the R-ratio. The application of a tensile overload has a profound effect on crack growth, resulting in a significant retardation in the crack propagation rate. A compressive overload (underload) leads to a short-lived acceleration in crack growth. Results from the two-step high-low loading reveal a period of crack growth retardation at the beginning of the lower amplitude step, an effect similar to that of a single overload. A crack driving force parameter together with a modified Wheeler model is found to correlate the crack growth experiments well.
AB - The crack growth behavior of AL6XN stainless steel was experimentally investigated using round compact tension (CT) specimens. The influences of the R-ratio (the ratio of the minimum load over the maximum applied load in a cycle), the tensile and compressive overloads, and the loading sequence on crack growth were studied in detail. The results from the constant-amplitude experiments show a sensitivity of the crack growth rate to the R-ratio. The application of a tensile overload has a profound effect on crack growth, resulting in a significant retardation in the crack propagation rate. A compressive overload (underload) leads to a short-lived acceleration in crack growth. Results from the two-step high-low loading reveal a period of crack growth retardation at the beginning of the lower amplitude step, an effect similar to that of a single overload. A crack driving force parameter together with a modified Wheeler model is found to correlate the crack growth experiments well.
KW - Fatigue crack growth
KW - Steel
KW - Stress intensity factor
UR - http://www.scopus.com/inward/record.url?scp=39249084932&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2007.11.002
DO - 10.1016/j.engfracmech.2007.11.002
M3 - Article
AN - SCOPUS:39249084932
SN - 0013-7944
VL - 75
SP - 2002
EP - 2019
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
IS - 8
ER -