Enhancement of Strength and Ductility in Bulk Nanocrystalline Metals

Nieh, T ; Schuh, C A ; Caturla, M J ; Hodge, A M

Lawrence Livermore National Laboratory

关键词: Dimensions;    36 Materials Science;    Simulation;    Grain Size;    71 Classical And Quantumm Mechanics, General Physics;   

DOI  :  10.2172/15013859
RP-ID  :  UCRL-TR-202501
RP-ID  :  W-7405-ENG-48
RP-ID  :  15013859

美国|英语

来源: UNT Digital Library

【 摘 要 】

The purpose of this project is to develop a robust scientific and technological framework for the design of high-strength and -ductility nanocrystalline materials for applications of technical importance to the Laboratory. The project couples theory and experiments with an emphasis on materials of macroscopic dimensions (mm to cm) that are composed of nanoscale (<100 nm) grains. There are four major tasks: (1) synthesize nanocrystalline materials with grain size in the 5- to 100-nm range; (2) conduct experimental studies to probe mechanisms of mechanical deformation and failure; (3) use large-scale simulation modeling technologies to provide insight to deformation mechanisms that may not be observable experimentally; and (4) check the results obtained from modeling, comparing experimental observations with results obtained from atomistic and dislocation-based simulations. This project supports efforts within the Stockpile Stewardship Program (SSP) to understand and predict properties of metals such as strength and ductility.