TY - JOUR
T1 - Effect of Pre-deformation on Nanoscale Precipitation and Hardness of a Maraging Stainless Steel
AU - Zhou, Xinlei
AU - Wang, Bin
AU - Zeng, Tianyi
AU - Yan, Wei
AU - Luan, Junhua
AU - Wang, Wei
AU - Yang, Ke
AU - Jiao, Zengbao
PY - 2022/12
Y1 - 2022/12
N2 - The effect of pre-deformation on nanoscale precipitates and hardness of a maraging stainless steel strengthened by the co-precipitation of Ni3Ti, Mo-enriched and Cr-enriched precipitates was systematically studied using electron back scattered diffraction, transmission electron microscopy and atom probe tomography (APT). Hardness measurements showed that the hardness of specimen with a deformation ratio of 90% peaked at HV 718 aged for 24 h, which is higher than that in the undeformed specimen (HV 603) aged for 72 h at 480 °C. APT characterization revealed that pre-deformation could shorten the incubation time of the Mo-enriched and Cr-enriched precipitates. At the early-aged stage, pre-deformation increased the stain energy that inhibited the nucleation of Ni3Ti precipitates, but accelerated the rejection of Mo from Ni–Ti clusters. Besides, the strengthening model indicated that strain hardening (43%) makes a larger contribution to the hardness at the early-aged condition, while precipitation hardening (58%) has most contribution to the hardness at the peak-aged conditition.
AB - The effect of pre-deformation on nanoscale precipitates and hardness of a maraging stainless steel strengthened by the co-precipitation of Ni3Ti, Mo-enriched and Cr-enriched precipitates was systematically studied using electron back scattered diffraction, transmission electron microscopy and atom probe tomography (APT). Hardness measurements showed that the hardness of specimen with a deformation ratio of 90% peaked at HV 718 aged for 24 h, which is higher than that in the undeformed specimen (HV 603) aged for 72 h at 480 °C. APT characterization revealed that pre-deformation could shorten the incubation time of the Mo-enriched and Cr-enriched precipitates. At the early-aged stage, pre-deformation increased the stain energy that inhibited the nucleation of Ni3Ti precipitates, but accelerated the rejection of Mo from Ni–Ti clusters. Besides, the strengthening model indicated that strain hardening (43%) makes a larger contribution to the hardness at the early-aged condition, while precipitation hardening (58%) has most contribution to the hardness at the peak-aged conditition.
KW - Atom probe tomography
KW - Maraging stainless steel
KW - Pre-deformation
KW - Precipitation hardening
UR - http://www.scopus.com/inward/record.url?scp=85135849519&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85135849519&origin=recordpage
U2 - 10.1007/s40195-022-01440-4
DO - 10.1007/s40195-022-01440-4
M3 - RGC 21 - Publication in refereed journal
SN - 1006-7191
VL - 35
SP - 2089
EP - 2100
JO - Acta Metallurgica Sinica (English Letters)
JF - Acta Metallurgica Sinica (English Letters)
IS - 12
ER -