Relaxation of thermal mismatch stress due to plastic deformation in an Al/SiCp metal matrix composite

2003 ◽  
Vol 341 (1-2) ◽  
pp. 74-86 ◽  
Author(s):  
R Levy-Tubiana ◽  
A Baczmanski ◽  
A Lodini
Keyword(s):  
Plastic Deformation ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Thermal Mismatch ◽  
Mismatch Stress ◽  
Thermal Mismatch Stress

Mechanical Properties and Microstructural Behavior of a Metal Matrix Composite Processed by Severe Plastic Deformation Techniques

MRS Advances ◽  
2015 ◽  
Vol 1 (58) ◽  
pp. 3865-3870 ◽  
Author(s):  
Shima Sabbaghianrad ◽  
Terence G. Langdon
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Room Temperature ◽  
High Pressure Torsion ◽  
Average Grain Size ◽  
Al 7075 ◽  
7075 Alloy

ABSTRACTA severe plastic deformation (SPD) technique was applied to an Al-7075 alloy reinforced with 10 vol.% Al2O3. This processing method of high-pressure torsion (HPT) was performed at room temperature under a pressure of 6.0 GPa through a total number of up to 20 turns. The metal matrix composite (MMC) showed a significant grain refinement from an initial average grain size of ∼8 μm to ∼300 nm after processing by HPT through 20 turns which led to an increase in the average values of Vickers microhardness at room temperature.

scholarly journals A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Y. N. Hou ◽  
K. M. Yang ◽  
J. Song ◽  
H. Wang ◽  
Y. Liu ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Crystal Plasticity ◽  
Metal Matrix ◽  
Plasticity Model ◽  
Matrix Composites ◽  
Thermal Mismatch ◽  
Crystal Plasticity Model ◽  
Heterogeneous Interfaces ◽  
Mismatch Stress ◽  
Thermal Mismatch Stress

AbstractOriginated at heterogeneous interfaces with distinct coefficient of thermal expansion (CTE), thermal mismatch stress is one of the critical influential factors to mechanical properties of metal matrix composites (MMCs). This stress is normally accommodated plastically by various defects, for example, high-density dislocations and twins in Al near heterogeneous interfaces in SiC/Al composites. Basic knowledge on the influence of defect characteristics is important but difficult to extrapolate from experimental results. However, existed theoretical models more focus on the influence of dislocation density, but less focus on defects variety, volume and distribution. In this paper, we propose a physics-based crystal plasticity model that has the capability of dealing with thermal mismatch stress induced dislocations and twins (denoted as TMDT model). The proposed TMDT model that is implemented in the Visco-Plastic Self-Consistent (VPSC) method considers defect heterogeneous distribution (gradient range), defect type (dislocations vs. twins) and defect volume fraction (twin spacing vs. twin volume). We demonstrate the validity and the capability of the VPSC-TMDT model in SiC/Al composites with thermal mismatch induced dislocations or twins. Furthermore, this model predicts the ultra-high strength of Graphene/Copper composites with high-density nanoscale twins, which is in turn the future aim for such nanocomposites.

Unique defect evolution during the plastic deformation of a metal matrix composite

2019 ◽  
Vol 162 ◽  
pp. 316-320 ◽  
Author(s):  
Yanfang Liu ◽  
Fang Wang ◽  
Yang Cao ◽  
Jinfeng Nie ◽  
Hao Zhou ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Defect Evolution
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