Recovery of strain-hardening rate in Ni-Si alloys.

Abstract

In this study, the recovery of strain-hardening rate (RSHR) was discovered for the first time in polycrystalline materials (Ni-Si alloys) that have only dislocation activities during tensile test. Detailed microstructure characterizations show that the activation of dislocations in the secondary slip systems during tensile deformation is the major reason for this RSHR. By taking into account other metals that also exhibit RSHR during tension, a more general mechanism for the RSHR was proposed, i.e. the occurrence of a sharp decrease of dislocation mean free path (Λ) during plastic deformation, caused by either planar defects or linear defects.

• Authors: C L Yang, Z J Zhang, T Cai, P Zhang, Z F Zhang
• Journal: Scientific reports (Sci Rep) Vol. 5 Pg. 15532 (Oct 21 2015) ISSN: 2045-2322 [Electronic] England
• PMID: 26487419 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)