Microstructural evolution in an Al-Zn-Mg-Cu alloy-20 Vol. % SiC composite shock-loaded to 5 GPa

Journal Article · Sat Aug 15 04:00:00 EDT 1992 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90206-T· OSTI ID:7080724

Hong, S I; Gray, III, G T ^[1]; Lewandowski, J J ^[2]

---

1. Materials Science and Technology Div., Los Alamos National Lab., Los Alamos, NM (US)
2. Dept. of Materials Science and Engineering, Case Western Reserve Univ., Cleveland, OH (US)

This paper reports that recently, the superior performance of Al-alloy-matrix composites under extreme loading conditions has attracted the attention of many investigators. Bless et al. have observed the reinforced-aluminum composites were up to three times more efficient at stopping tungsten projectiles than an unreinforced-Al alloy. Marchand et al. and Cho et al. have also found that dynamic loading raises the value of the critical stress intensity factor of fracture for Al alloy matrix composites. Recent work has observed more frequent interfacial cracks during dynamic deformation than during quasi-static deformation in an Al-Zn-Mg-Cu Alloy-20 vol. % SiC composite, which could lower fracture toughness at high strain rates. The purpose of the present study was to investigate the microstructure development in an A;-Zn-Mg-Cu Alloy-20 vol. % SiC composite deformed at even higher strain rates ({gt}10{sup 6}/sec) than the rates employed previously (10{sup {minus}3}--10{sup 4}/sec) by the present investigators. In this study, the microstructural evolution and damage accumulation in shock-loaded underaged and overaged composites will be compared with those observed at lower stain rates.

• OSTI ID: 7080724
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 27:4; ISSN SCRME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
COPPER ALLOYS
CRACKS
CRYSTAL STRUCTURE
DEFORMATION
DYNAMIC LOADS
INTERFACES
MAGNESIUM ALLOYS
MATERIALS
MATRIX MATERIALS
MICROSTRUCTURE
SHOCK WAVES
SILICON CARBIDES
SILICON COMPOUNDS
STATIC LOADS
STRAIN RATE
VERY HIGH PRESSURE
ZINC ALLOYS