Serrated flow in cast ZE43 alloy

• Published in: Journal of materials science Vol. 42; no. 8; pp. 2630 - 2632
• Main Authors: WANG, C. Y, ZHANG, X. N, CAO, N. Z, LIU, Z
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.04.2007; Springer Nature B.V
• Subjects: Alloys; Aluminum alloys; Aluminum base alloys; Ambient temperature; Cross-disciplinary physics: materials science; rheology; Diffusion; Dislocation mobility; Dynamic strain aging; Exact sciences and technology; Magnesium base alloys; Materials science; Other topics in materials science; Physics; Plastic deformation; Portevin-le Chatelier effect; Precipitation hardening; Solid solutions; Foundries; Cast alloy
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-006-1346-3

Plastic deformation of solid solutions is occasionally accompanied by plastic instabilities, i.e. serrated flow or the Partevin-Le Chatelier (PLC) effect. The PLC effect has been observed and investigated in various kinds of aluminum alloys [1, 2, 3, 4, 5]. For most aluminum alloys, this effect is observed at ambient temperature. The dynamic interaction between mobile dislocations and diffusing solute atoms, known as dynamic strain aging (DSA), is commonly accepted to account for the observed phenomena [6, 7, 8, 9, 10, 11].Compared to the extensive investigations on serrated flow of aluminum alloys, only a few papers have been concerned with the serrated flow in magnesium alloys. Couling [12] briefly reported the anomalous yielding effect in a Mg–0.5%Th alloy at testing temperatures from 373 K to 663 K. Chaturvedi et al. [13, 14] reported serrated flow in an Mg–10 wt.%Ag solid solution at temperatures between 326 K and 397 K. Zhu et al. [15] recently observed serrated flow in a...