On the microstructural and functional stability of Fe-Mn-Al-Ni at ambient and elevated temperatures. (15th March 2019)

• Record Type: Journal Article
• Authors: Vollmer, M.; Kriegel, M.J.; Walnsch, A.; Klemm, V.; Leineweber, A.; Niendorf, T.
• Is Part Of: Scripta materialia. Number 162(2019)
• Page Start: 442
• Page End: 446
• Publication Date: 2019-03-15
• Subjects: FeMnAlNi -- RT aging -- Iron-based shape memory alloy -- High-temperature shape memory alloy -- Abnormal grain growth; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.12.008
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In the present study the effect of multiple aging treatments ranging from room temperature to 150 °C on the pseudoelastic behavior of previously aged bamboo-structured as well as single crystalline specimens of a Fe-34.8Mn-13.5Al-7.4Ni (at.%) shape memory alloy was investigated. No additional room temperature aging effects occurred in the initially aged bamboo-structured tensile specimen stored for two years, whereas small changes in the pseudoelastic response in single crystalline specimens stored for 96 h at elevated temperatures were seen. It appears that an average precipitate sizes of about 13 nm is sufficient to impede undesired aging effects at least at room temperature. Graphical abstract: Unlabelled Image