Relationship between fracture toughness, fracture path, and microstructure of 7050 aluminum alloy. Part 2: Multiple micromechanisms-based fracture toughness model
- Georgia Inst. of Tech., Atlanta, GA (United States). School of Materials Science and Engineering
- Cessna Aircraft Co., Wichita, KS (United States)
- Alcoa Technical Center, Alcoa Center, PA (United States)
A multiple micromechanisms-based model is developed to quantitatively relate the fracture toughness of partially recrystallized 7XXX aluminum alloys to their fracture surface morphology. The model is verified using the experimental data on partially recrystallized 7050 alloy reported in the companion article. It is then used to obtain a quantitative relationship between the fracture toughness and microstructural attributes. The model relates fracture toughness to microstructural parameters such as degree of recrystallization, grain size of recrystallized grains, thickness of recrystallized regions, total surface area of the constituent particles per unit volume, and microstructural anisotropy. The model predicts the changes in the fracture toughness with the specimen orientation.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 616496
- Journal Information:
- Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 29, Issue 4; Other Information: PBD: Apr 1998
- Country of Publication:
- United States
- Language:
- English
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