TY - GEN
T1 - Charpy absorbed energy of cold press-bent steel plates made of SM520C
AU - Kitazume, D.
AU - Nie, J.
AU - Ono, K.
AU - Anami, K.
AU - Miyashita, T.
AU - Mishima, Y.
AU - Iida, T.
N1 - Funding Information:
Acknowledgements This work was supported by JSPS KAKENHI (grant number 18K04331) and the Japan Iron and Steel Federation.
Publisher Copyright:
© Springer Nature Singapore Pte Ltd. 2021.
PY - 2021
Y1 - 2021
N2 - Facing the problems of damaged bridge piers with box sections due to the rupture of the corner welds, cold press-bent steel structure was considered as a possible solution. However, strain aging induced by cold-forming may lead to decrease in toughness and elongation, as well as increase in hardness and strength. This paper focuses on the adverse effects of strain aging on the test pieces made of steel SM520C, which were evaluated through Vicker’s hardness test and Charpy impact tests. The test pieces were taken from different locations of the cold press-bent corner parts, and the Charpy impact test was conducted after one month, six months and one year correspondingly. The hardness of the material increased due to the effect of strain aging, especially at both edges at the maximum curvature of the corner part. Small effect of strain aging on the Charpy absorbed energy was found under 0 °C, while larger reduction ratio was obtained under a lower temperature −60 °C. In the future, steel materials with high toughness are suggested to be studied in order to widen the usage of cold-formed structures.
AB - Facing the problems of damaged bridge piers with box sections due to the rupture of the corner welds, cold press-bent steel structure was considered as a possible solution. However, strain aging induced by cold-forming may lead to decrease in toughness and elongation, as well as increase in hardness and strength. This paper focuses on the adverse effects of strain aging on the test pieces made of steel SM520C, which were evaluated through Vicker’s hardness test and Charpy impact tests. The test pieces were taken from different locations of the cold press-bent corner parts, and the Charpy impact test was conducted after one month, six months and one year correspondingly. The hardness of the material increased due to the effect of strain aging, especially at both edges at the maximum curvature of the corner part. Small effect of strain aging on the Charpy absorbed energy was found under 0 °C, while larger reduction ratio was obtained under a lower temperature −60 °C. In the future, steel materials with high toughness are suggested to be studied in order to widen the usage of cold-formed structures.
KW - Charpy absorbed energy
KW - Cold press-bent steel plates
KW - SM520C
KW - Vicker’s hardness test
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U2 - 10.1007/978-981-15-8079-6_93
DO - 10.1007/978-981-15-8079-6_93
M3 - Conference contribution
AN - SCOPUS:85104117638
SN - 9789811580789
T3 - Lecture Notes in Civil Engineering
SP - 981
EP - 1000
BT - EASEC16 - Proceedings of the 16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019
A2 - Wang, Chien Ming
A2 - Kitipornchai, Sritawat
A2 - Dao, Vinh
PB - Springer Science and Business Media Deutschland GmbH
T2 - 16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019
Y2 - 3 December 2019 through 6 December 2019
ER -