Uniaxial compressive behavior of equal channel angular pressing Al at wide temperature and strain rate range

Autor:	Zhongbin Tang, Tao Suo, Feng Zhao, Yu-long Li, Bu-sheng Zhang, Xueling Fan
Rok vydání:	2014
Předmět:	Pressing Materials science Strain (chemistry) Metallurgy Metals and Alloys Strain rate Strain hardening exponent Flow stress Geotechnical Engineering and Engineering Geology Condensed Matter Physics Volume (thermodynamics) Drag Materials Chemistry Composite material Dislocation
Zdroj:	Transactions of Nonferrous Metals Society of China. 24:2447-2452
ISSN:	1003-6326
DOI:	10.1016/s1003-6326(14)63369-0
Popis:	Uniaxial compressive experiments of ultrafine-grained Al fabricated by equal channel angular pressing (ECAP) method were performed at wide temperature and strain rate range. The influence of temperature on flow stress, strain hardening rate and strain rate sensitivity was investigated experimentally. The results show that both the effect of temperature on flow stress and its strain rate sensitivity of ECAPed Al is much larger than those of the coarse-grained Al. The temperature sensitivity of ultrafine-grained Al is comparatively weaker than that of the coarse-grained Al. Based on the experimental results, the apparent activation volume was estimated at different temperatures and strain rates. The forest dislocation interactions is the dominant thermally activated mechanism for ECAPed Al compressed at quasi-static strain rates, while the viscous drag plays an important role at high strain rates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8541043c0b7b2f5fa0e921e9470e369a https://doi.org/10.1016/s1003-6326(14)63369-0 Zobrazit plný text záznamu Full Text from ScienceDirect