CHARPY IMPACT TESTS ON LOW-YIELD POINT STEEL SUBJECTED TO THERMAL CYCLE AND PRE-STRAIN

Low-yield point steel has been used in seismic control dampers due to its high energy absorption ability. Meanwhile, thermal cycle during welding can change mechanical properties and microstructure of low-yield point steel. In addition, large plastic strains caused by seismic motion can induce defec...

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Bibliographic Details
Published inKou kouzou rombunshuu Vol. 28; no. 109; pp. 109_183 - 109_190
Main Authors SHIMIZU, Masaru, TATEISHI, Kazuo, HANJI, Takeshi, AOKI, Yasumoto
Format Journal Article
LanguageJapanese
Published Japanese Society of Steel Construction 25.03.2021
Subjects
Charpy impact test
Low-yield point steel
pre-strain
thermal cycle
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Summary:Low-yield point steel has been used in seismic control dampers due to its high energy absorption ability. Meanwhile, thermal cycle during welding can change mechanical properties and microstructure of low-yield point steel. In addition, large plastic strains caused by seismic motion can induce defects in microstructure. They can cause the reduction in toughness of the low-yield point steel. In this study, Charpy impact tests were performed for low-yield point steel with thermal cycle simulating heat affected zone and preliminary plastic strain. Significant reduction in Charpy absorbed energy was observed when applying simulated thermal cycle, while the preliminary strain gives insignificant reduction.
ISSN:1880-9928
1884-0329
DOI:10.11273/jssc.28.109_183