Statistical models for cyclic strain hardening of copper single crystals

Autor:	H. Martikka, Pentti Kettunen
Rok vydání:	1997
Předmět:	Materials science Mechanical Engineering Mineralogy Slip (materials science) Work hardening Plasticity Strain hardening exponent Condensed Matter Physics Stress field Mechanics of Materials Hardening (metallurgy) Shear stress General Materials Science Composite material Weibull distribution
Zdroj:	Materials Science and Engineering: A. :193-197
ISSN:	0921-5093
DOI:	10.1016/s0921-5093(97)00156-1
Popis:	Models based on testing of copper single crystals and on the statistical theories of flow and cyclic work hardening are developed to explain the measurements of plastic strain amplitude as a function of acting shear stress amplitude, flow strength and number of cycles. The penetration probability of mobile dislocations through the microstructural obstacle distribution is analogous to the Weibull distribution depending on the ratio of stress amplitude to flow strength and other physical parameters. For the easy glide orientation crystals the results support the strain hardening model where new obstacles are stored as Orowan type loops and for multiple slip orientation crystals the forest cutting and the long range stress field theories seem probable.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ff88bba05f035b080ad45acceccf9d8 https://doi.org/10.1016/s0921-5093(97)00156-1 Zobrazit plný text záznamu Full Text from ScienceDirect