| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
Uniaxial Tensile Behavior After Baking Treatment in a Low Carbon Steel Accompanying Inhomogeneous Plastic Yielding |
| Author(s) |
Woojin Cho, Byeong-Seok Jeong, Eunjoo Shin, Siwook Park, Hyuntaek Na, Heung Nam Han |
| On-Site Speaker (Planned) |
Woojin Cho |
| Abstract Scope |
In this study, two kinds of steels with the same composition accompanying yield point phenomenon during the uniaxial tensile test were prepared; one is composed of the acicular ferrite with pre-existing mobile dislocations and the other is the annealed polygonal ferrite with few mobile dislocations. Pre-strains were applied to these steels at 25, 50, 75, and 100% of the strain where the Lüders band (LB) completely propagated to the gauge section. Until the LB fully propagate to the gauge section, no bake hardening (BH) response was observed for in either steel. However, when the LB completely propagated to the gauge section (100%), we can confirm BH response appeared considerably in both specimens. This BH behavior was analyzed through digital image correlation technique and macro-indentation tests. Additional changes in uniaxial tensile behavior e.g., total elongation, yield point phenomenon, and tensile strength was discussed utilizing nano-indentation and small angle neutron scattering. |