TY - JOUR
T1 - Role of retained austenite on adiabatic shear band formation during high strain rate loading in high-strength bainitic steels
AU - Jo, Min Cheol
AU - Kim, Selim
AU - Suh, Dong Woo
AU - Hong, Sung Suk
AU - Kim, Hong Kyu
AU - Sohn, Seok Su
AU - Lee, Sunghak
N1 - Funding Information:
This work was supported by the Agency for Defense Development (grant No. UE161030GD), a Korea University Grant for the sixth author, and the BK21 Plus Center for Creative Industrial Materials.
Funding Information:
This work was supported by the Agency for Defense Development (grant No. UE161030GD ), a Korea University Grant for the sixth author, and the BK21 Plus Center for Creative Industrial Materials.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/3/19
Y1 - 2020/3/19
N2 - Adiabatic shear band (ASB) is a well-known structure formed during high strain-rate deformation in various metallic materials, and significantly affects dynamic properties as well as ballistic performance. Retained austenite contained in recently developed high-strength martensitic or bainitic armor steels usually triggers a TRansformation-Induced Plasticity (TRIP), which enhances a strain hardening capability. However, this TRIP effect on ASB formation has hardly been investigated yet. In this study, a laboratory-scale split Hopkinson pressure bar was utilized to describe the ASB formation behavior in four high-strength martensitic or bainitic armor steels. Their formation possibilities were then correlated with hardness, strength, and dynamic compressive properties coupled with the TRIP. This TRIP occurring under adequate austenite stability improved the strain hardening, sufficiently absorbed the dynamically applied energy, and effectively suppressed the ASB formation. These behaviors suggest the favorable utilization of retained austenite in high-strength armor steels for wide-range ballistic applications.
AB - Adiabatic shear band (ASB) is a well-known structure formed during high strain-rate deformation in various metallic materials, and significantly affects dynamic properties as well as ballistic performance. Retained austenite contained in recently developed high-strength martensitic or bainitic armor steels usually triggers a TRansformation-Induced Plasticity (TRIP), which enhances a strain hardening capability. However, this TRIP effect on ASB formation has hardly been investigated yet. In this study, a laboratory-scale split Hopkinson pressure bar was utilized to describe the ASB formation behavior in four high-strength martensitic or bainitic armor steels. Their formation possibilities were then correlated with hardness, strength, and dynamic compressive properties coupled with the TRIP. This TRIP occurring under adequate austenite stability improved the strain hardening, sufficiently absorbed the dynamically applied energy, and effectively suppressed the ASB formation. These behaviors suggest the favorable utilization of retained austenite in high-strength armor steels for wide-range ballistic applications.
KW - Adiabatic shear band (ASB)
KW - Austenite stability
KW - High-strength martensitic or bainitic armor steel
KW - Retained austenite
KW - Split Hopkinson pressure bar
KW - TRansformation-induced plasticity (TRIP)
UR - http://www.scopus.com/inward/record.url?scp=85079849742&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2020.139118
DO - 10.1016/j.msea.2020.139118
M3 - Article
AN - SCOPUS:85079849742
VL - 778
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
M1 - 139118
ER -