Architecting multiscale heterostructure for exceptional strength-ductility synergy in super duplex stainless steel 2507
Abstract
A multiscale heterostructure integrating duplex phases, grain size contrast and nanoscale chemical modulations were architected in super duplex stainless steel 2507, achieving a high yield strength of 1112 MPa and ultimate tensile strength of 1411 MPa with a large elongation of 27%. The primary strengthening mechanisms are HDI, dislocation and spinodal decomposition strengthening which were quantitatively assessed. A predictive model for the yield strength evolution with aging time was developed. This study demonstrates a novel strategy for developing high-performance alloys through leveraging multiscale heterostructures to overcome the strength-ductility trade-off.
Fields of Study & Subjects
Hydrogen embrittlement and corrosion behaviors in metals
Shape Memory Alloy Transformations
Microstructure and mechanical properties
Publication details
- Journal / source
- Materials Research Letters
- Publisher
- Informa UK Limited
- Volume
- 14
- Issue
- 5
- Pages
- 528–537
- Publication date
- 26 February 2026
- Language
- EN