Quantitative description of damage evolution in ductile fracture of tantalum

Autor:	J. M. Rivas, Robert Hixson, W.R. Thissell, A.K. Zurek, Davis L. Tonks
Rok vydání:	2000
Předmět:	Void (astronomy) Structural material Materials science Optical profilometry Metallurgy Metals and Alloys Tantalum chemistry.chemical_element Condensed Matter Physics Spall chemistry Mechanics of Materials Spallation Porosity Weibull distribution
Zdroj:	Metallurgical and Materials Transactions A. 31:845-851
ISSN:	1543-1940 1073-5623
Popis:	Dynamic ductile fracture has been studied through incipient spallation experiments on two grades of tantalum. A commercially pure Ta material incipiently spalled at 252 m/s, a highly pure Ta material incipiently spalled at 246 m/s, and a highly pure Ta material preshocked at 250 m/s and incipiently spalled at 246 m/s were used. Microstructural parameters of the fracture process such as porosity, void-size distributions, and void aspect ratios have been quantified using image analysis and optical profilometry techniques. The commercially pure Ta, the highly pure Ta preshocked prior to spall, and the annealed high-purity Ta exhibited 27, 16.6, and 5.5 pct porosity, respectively. The void-size distribution observed in all three tests was adequately represented by either a log-normal or a linear combination of a log-normal and a Weibull distribution function. At least 80 pct of the aspect ratios observed in all three tests were adequately represented by a gamma distribution function.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2525a90d17ebdd6668ccc3e791668283 https://doi.org/10.1007/s11661-000-1004-3 Zobrazit plný text záznamu Full text from SpringerLink