National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

DE2004771249

Publication Date	2002
Personal Author	Gosh, A. K.
Page Count	156
Abstract	This report on Microstructural and Physical Basis for Superplastic Cavitation in Aluminum Alloys embodies work carried out jointly between PhD student Donghyun Bae and Professor Amit Ghosh and in direct collaboration with General Motors R&D Center, Pacific Northwest National Laboratory and Air Force Research Laboratory. Considerable new information on the initiation of nanoscopic damage in A1 alloys, and the growth of voids through the microscopic and mesoscopic scales has been developed in this work. New information on the role of stress-state on void growth has been obtained. It has been shown that underpredictions of previous models of void growth are related to the lack of recognition of local stress-concentration effects surrounding the voids, persisting even at elevated temperatures.
Keywords	Aluminum alloys Superplasticity Microstructure Cavitation Grain boundaries Alloys Stresses Dislocations Creep Mechanical properties Research and development
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Michigan Univ., Ann Arbor.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514

Microstructural and Physical Basis for Superplastic Cavitation in Aluminum Alloys. Final Report, September 15, 1996-October 14, 2000.

Microstructural and Physical Basis for Superplastic Cavitation in Aluminum Alloys. Final Report, September 15, 1996-October 14, 2000.
DE2004771249

Publication Date	2002
Personal Author	Gosh, A. K.
Page Count	156
Abstract	This report on Microstructural and Physical Basis for Superplastic Cavitation in Aluminum Alloys embodies work carried out jointly between PhD student Donghyun Bae and Professor Amit Ghosh and in direct collaboration with General Motors R&D Center, Pacific Northwest National Laboratory and Air Force Research Laboratory. Considerable new information on the initiation of nanoscopic damage in A1 alloys, and the growth of voids through the microscopic and mesoscopic scales has been developed in this work. New information on the role of stress-state on void growth has been obtained. It has been shown that underpredictions of previous models of void growth are related to the lack of recognition of local stress-concentration effects surrounding the voids, persisting even at elevated temperatures.
Keywords	Aluminum alloys Superplasticity Microstructure Cavitation Grain boundaries Alloys Stresses Dislocations Creep Mechanical properties Research and development
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Michigan Univ., Ann Arbor.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514