TY - JOUR
T1 - Effects of 3D microstructural distribution on short crack growth behavior in two bimodal Ti–6Al–4V alloys
AU - Hassanipour, M.
AU - Watanabe, S.
AU - Hirayama, Kyosuke
AU - Toda, H.
AU - Uesugi, K.
AU - Takeuchi, A.
N1 - Funding Information:
The synchrotron radiation experiments were performed at SPring-8 with the approval of Japan Synchrotron Radiation Research Institute (JASRI) through proposal numbers of 2016B0076, 2017A0076 and, 2017B0076. This work was supported through the grant-in-aid for scientific research from Structural Materials for Innovation (SM4I) of the Cross-ministerial Strategic Innovation Promotion Program (SIP). The authors gratefully acknowledge the support of Light Metal Educational Foundation (LMEF).
Funding Information:
The synchrotron radiation experiments were performed at SPring-8 with the approval of Japan Synchrotron Radiation Research Institute (JASRI) through proposal numbers of 2016B0076 , 2017A0076 and, 2017B0076 . This work was supported through the grant-in-aid for scientific research from Structural Materials for Innovation (SM4I) of the Cross-ministerial Strategic Innovation Promotion Program (SIP). The authors gratefully acknowledge the support of Light Metal Educational Foundation (LMEF).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10/24
Y1 - 2019/10/24
N2 - In situ X-ray micro-tomography was performed to analyze the short crack growth in the 3D microstructure of two bimodal Ti–6Al–4V alloys with predominant α+β and α phase volume fractions. Short crack strongly interacts with the local microstructure and it grows into the predominant phase above the average microstructural fraction in each alloy. The higher volume fraction and size of the α grains in the microstructure induce crack growth with lower variations and larger deflection lengths inside the α grains. As the short crack length increases, the larger deflections left behind the crack front induces higher crack closure that decreases the crack driving forces. As a result, the short crack remains sensitive to the local microstructural features at higher lengths.
AB - In situ X-ray micro-tomography was performed to analyze the short crack growth in the 3D microstructure of two bimodal Ti–6Al–4V alloys with predominant α+β and α phase volume fractions. Short crack strongly interacts with the local microstructure and it grows into the predominant phase above the average microstructural fraction in each alloy. The higher volume fraction and size of the α grains in the microstructure induce crack growth with lower variations and larger deflection lengths inside the α grains. As the short crack length increases, the larger deflections left behind the crack front induces higher crack closure that decreases the crack driving forces. As a result, the short crack remains sensitive to the local microstructural features at higher lengths.
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U2 - 10.1016/j.msea.2019.138264
DO - 10.1016/j.msea.2019.138264
M3 - Article
AN - SCOPUS:85071686642
SN - 0921-5093
VL - 766
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
M1 - 138264
ER -