A possibility to synchronously improve the high-temperature strength and ductility in face-centered cubic metals through grain boundary engineering. (October 2020)

• Record Type: Journal Article
• Authors: Guan, X.J.; Shi, F.; Ji, H.M.; Li, X.W.
• Is Part Of: Scripta materialia. Number 187(2020)
• Page Start: 216
• Page End: 220
• Publication Date: 2020-10
• Subjects: Cu-Al alloy -- Grain boundary engineering -- High temperature -- Strength-ductility match -- Dynamic recrystallization; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.06.026
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: To examine the influence of grain boundary engineering (GBE) on the high-temperature mechanical properties of face-centered cubic (FCC) metals, the tensile tests were carried out at 723 K on the non-GBE and GBE Cu-16at.%Al alloy samples. The GBE treatment increases the deformation uniformity and cracking resistance, thus effectively improves the high-temperature ductility. Moreover, the dynamic recrystallization (DRX) of the GBE sample is significantly suppressed due to the reduction of the Gibbs free energy, impeding the high-temperature softening. Therefore, the high-temperature strength and ductility of FCC metals might be synchronously improved by a GBE treatment under the premise that DRX occurs. Graphical abstract: Image, graphical abstract