TY - JOUR
T1 - Fatigue crack growth resistance in Ni-base super alloy
AU - Morino, K.
AU - Kawagoishi, N.
AU - Chen, Q.
AU - Matsuyama, Y.
AU - Nakamura, Y.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - Rotating bending fatigue tests were carried out to investigate the influence of grain size on the resistance to crack growth of Ni-base super alloy, Inconel 718, using the materials with grain sizes of about 20, 50,100 and 200 μ, at room temperature. The larger grain size, the smaller crack growth rate, though the static strength was decreased with increase in grain size. The growth rate of a small crack was uniquely determined by the term σan (Small crack growth law), where σ a and a are the stress amplitude and the crack length, respectively, and n is a constant. The resistance to crack growth among materials was evaluated based on the law and showed a good correlation with tensile strength σB, meaning that fatigue life can be predicted by using only σB.
AB - Rotating bending fatigue tests were carried out to investigate the influence of grain size on the resistance to crack growth of Ni-base super alloy, Inconel 718, using the materials with grain sizes of about 20, 50,100 and 200 μ, at room temperature. The larger grain size, the smaller crack growth rate, though the static strength was decreased with increase in grain size. The growth rate of a small crack was uniquely determined by the term σan (Small crack growth law), where σ a and a are the stress amplitude and the crack length, respectively, and n is a constant. The resistance to crack growth among materials was evaluated based on the law and showed a good correlation with tensile strength σB, meaning that fatigue life can be predicted by using only σB.
UR - http://www.scopus.com/inward/record.url?scp=34547179822&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547179822&partnerID=8YFLogxK
U2 - 10.4028/0-87849-448-0.541
DO - 10.4028/0-87849-448-0.541
M3 - Article
AN - SCOPUS:34547179822
VL - 348-349
SP - 541
EP - 544
JO - Key Engineering Materials
JF - Key Engineering Materials
SN - 1013-9826
ER -