TY - JOUR
T1 - Effects of sigma phase on the embrittlement behavior of super duplex stainless steel F55 under SSRT with a cathodic charge
AU - Shimada, Yusuke
AU - Hatakeyama, Masahiko
AU - Hirabayashi, Jyunichi
AU - Yamamoto, Yuichi
AU - Sato, Koichi
AU - Sunada, Satoshi
N1 - Publisher Copyright:
© 2019 The Japan Institute of Metals and Materials
PY - 2019
Y1 - 2019
N2 - In order to clarify the influence of sigma phase and hydrogen embrittlement on the mechanical properties of newly developed super duplex stainless steel F55, SSRT was conducted while performing cathodic charge. The installation potential of the constant potential SSRT was determined by polarization curve measurement. Based on the results obtained from polarization curve measurements, SSRT’s were conducted in the air, in corrosive solution, at +0.5 V constant potential, and at -0.5 V (vs. Ag/AgCl) constant potential. In order to observe the relationship between the test environment and the fracture mode, the fracture surface was observed with a scanning electron microscope and the influence of the · phase on hydrogen embrittlement was examined. Hydrogen embrittlement was observed regardless of the amount of · phase. As specimen having a · phase area ratio of 30% showed larger embrittlement caused by the · phase in air, it was suggested that · phase embrittlement controls an embrittlement behavior. Enhancement of hydrogen embrittlement by · phase precipitations was not observed in a cathodic charge condition used in this experiment.
AB - In order to clarify the influence of sigma phase and hydrogen embrittlement on the mechanical properties of newly developed super duplex stainless steel F55, SSRT was conducted while performing cathodic charge. The installation potential of the constant potential SSRT was determined by polarization curve measurement. Based on the results obtained from polarization curve measurements, SSRT’s were conducted in the air, in corrosive solution, at +0.5 V constant potential, and at -0.5 V (vs. Ag/AgCl) constant potential. In order to observe the relationship between the test environment and the fracture mode, the fracture surface was observed with a scanning electron microscope and the influence of the · phase on hydrogen embrittlement was examined. Hydrogen embrittlement was observed regardless of the amount of · phase. As specimen having a · phase area ratio of 30% showed larger embrittlement caused by the · phase in air, it was suggested that · phase embrittlement controls an embrittlement behavior. Enhancement of hydrogen embrittlement by · phase precipitations was not observed in a cathodic charge condition used in this experiment.
KW - Cathodic charge
KW - Hydrogen embrittlement
KW - SSRT
KW - Sigma phase
KW - Super duplex stainless steel
UR - http://www.scopus.com/inward/record.url?scp=85074199728&partnerID=8YFLogxK
U2 - 10.2320/matertrans.MT-MAW2019006
DO - 10.2320/matertrans.MT-MAW2019006
M3 - 学術論文
AN - SCOPUS:85074199728
SN - 1345-9678
VL - 60
SP - 2378
EP - 2386
JO - Materials Transactions
JF - Materials Transactions
IS - 11
ER -