Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1579437 | Materials Science and Engineering: A | 2010 | 8 Pages |
Abstract
The strain softening behavior of a particle-containing copper alloy and the associated microstructure changes were investigated as a function of strain rate ÎµË and analyzed by modeling. It is shown that, increasing strain rate ÎµË favors the multiple peak type behavior for flow stress and the appearance of strain softening behavior. During the ambient compression, the fiber structure, dislocation density and dislocation cell size and shape were also changed significantly with increasing of strain rate εË. The transition from strengthening to softening was explained in terms of generation and annihilation of dislocations within dislocation cells or at cell boundaries. A new constitutive equation was developed to well describe the strain softening in the particle-containing alloy compressed at different strain rates.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Mingxing Guo, Kun Shen, Mingpu Wang,