Strength–ductility materials by engineering a coherent interface at incoherent precipitates
Dongxin Mao, Yuming Xie, Xiangchen Meng, Xiaotian Ma, Zeyu Zhang, Xiuwen Sun, Long Wan, Volodymyr Korzhyk, Yongxian Huang
Abstract
Cu) precipitates. The ultimate tensile strength and elongation reached 620 ± 18 MPa and 22.3 ± 2.2%, exhibiting excellent strength-ductility synergy. Grain boundaries, dislocation, solid solution atoms, and precipitates all contributed to the yield strength of the materials, among which precipitates occupied a dominant position, contributing approximately 56.07%. A new "incoherent-coherent interact" strain-hardening mechanism was also clarified, which was believed to be promoted in other heat-treatable alloy systems, especially with multi-step metastable phase transitions.
Topics & Concepts
Materials scienceDuctility (Earth science)MicrostructureMaterial DesignInterface (matter)Mechanical designNanotechnologyComposite materialMechanical engineeringEngineeringCreepCapillary numberCapillary actionAluminum Alloys Composites PropertiesAnodic Oxide Films and NanostructuresMicrostructure and mechanical properties