Abstract
The fracture behavior was characterized using uniaxial tension and double edge notched tension (DENT) in a one-step quenching and partitioning steel. This steel consisted of lamellar matrix (tempered martensite and bainitic ferrite lath) together with dispersed blocky and film RA/M (retained austenite and/or fresh martensite). Lamellar structure promoted trans-lath fracture; whereas, blocky RA/M island contributed to ductile fracture in uniaxial tension but induced brittle fracture in DENT test because a higher stress triaxiality in the latter enhanced the rate of martensite transformation and in turn boosted early crack nucleation and propagation.
| Original language | English |
|---|---|
| Article number | 12023 |
| Journal | Journal of Physics: Conference Series |
| Volume | 1653 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2 Nov 2020 |
| Event | 2020 International Conference on Advanced Materials and Intelligent Manufacturing and Advanced Steel for Automotive Seminar, ICAMIM 2020 - Guilin, China Duration: 21 Aug 2020 → 23 Aug 2020 |
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