Thermally activated deformation processes in body-centered cubic Cr – How microstructure influences strain-rate sensitivity. (September 2015)

• Record Type: Journal Article
• Authors: Maier, Verena; Hohenwarter, Anton; Pippan, Reinhard; Kiener, Daniel
• Is Part Of: Scripta materialia. Volume 106(2015)
• Page Start: 42
• Page End: 45
• Publication Date: 2015-09
• Subjects: High temperature nanoindentation -- Critical temperature -- bcc -- ufg; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.05.001
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract : The microstructure dependent deformation behavior of chromium, especially in terms of strain-rate sensitivity (SRS), was studied by means of improved nanoindentation methods as a function of temperature. Cr was investigated in the single crystalline (sx) and ultrafine-grained (ufg) condition. With increasing temperature a decreasing SRS was determined for sx-Cr, while for ufg-Cr a significant increase upon overcoming the critical temperature T c was measured. This is attributed to the increased importance of dislocation–grain boundary interactions, and a change in the dominating deformation behavior.