Unique defect evolution during the plastic deformation of a metal matrix composite
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 316-320 |
Journal / Publication | Scripta Materialia |
Volume | 162 |
Online published | 24 Nov 2018 |
Publication status | Published - 15 Mar 2019 |
Externally published | Yes |
Link(s)
Abstract
During the plastic deformation of a metal matrix composite (MMC) containing non-deformable particles, high dislocation density and strong back stresses are expected because the particles help with blocking and accumulating dislocations. Here we report that the MMC has lower, instead of higher, dislocation density than the corresponding monolithic matrix material when they are deformed to high plastic strains, because smaller sub-grains in the MMC lowered dislocation generation rate and meanwhile promoted the dislocation interaction and annihilation in the matrix. This unique defect density evolution is a hitherto unknown but important factor affecting the mechanical properties of MMCs.
Research Area(s)
- Composite, Dislocation density, Microstructure, Plastic deformation, Strain-hardening
Citation Format(s)
Unique defect evolution during the plastic deformation of a metal matrix composite. / Liu, Yanfang; Wang, Fang; Cao, Yang et al.
In: Scripta Materialia, Vol. 162, 15.03.2019, p. 316-320.
In: Scripta Materialia, Vol. 162, 15.03.2019, p. 316-320.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review