Fatigue perturbed creep of pure aluminum at ambient temperatures

Autor:	David K. Matlock, Walter L. Bradley, Soo W. Nam
Rok vydání:	1976
Předmět:	Cyclic stress Structural material Materials science Metals and Alloys chemistry.chemical_element Diffusion creep Activation energy Condensed Matter Physics Stress (mechanics) chemistry Creep Mechanics of Materials Aluminium Stress relaxation Composite material
Zdroj:	Metallurgical Transactions A. 7:425-430
ISSN:	2379-0180 0360-2133
DOI:	10.1007/bf02642839
Popis:	The creep of 99.999 pct pure aluminum subject to tension-tension cyclic stressing (dynamic creep) has been studied and compared to creep for the peak cyclic stress applied statically (static creep). The creep rate for a cyclic stress of 29.8 to 3.7 MPa was always found to be greater than the creep rate for static application of a stress of 29.8 MPa over the temperature range of 302 K to 348 K. The ratio of the dynamic creep rate to the static creep rate was found to increase with increasing strain and decreasing temperature. The apparent activation energy measured for dynamic creep was less than that measured for static creep. The substructure for dynamic creep is softer than for static creep and probably accounts for the accelerated creep rate and the lower observed activation energy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::447d26ccbd38e6dcb9b2e949f2c40672 https://doi.org/10.1007/bf02642839 Zobrazit plný text záznamu