Microstructure, mechanical properties and shape memory effect of Ni–Mn–Ga–B high-temperature shape memory alloy. (January 2016)

• Record Type: Journal Article
• Authors: Zhang, Xin; Liu, Qingsuo; Zeng, Xianshun; Sui, Jiehe; Cai, Wei; Wang, Haibo; Feng, Yan
• Is Part Of: Intermetallics. Volume 68(2016:Jan.)
• Page Start: 113
• Page End: 117
• Publication Date: 2016-01
• Subjects: Shape–memory alloys -- Mechanical properties -- Shape–memory the effects -- Microstructure; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2015.10.003
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: The effects of boron addition on the microstructure, transformation temperature, mechanical properties and shape memory effect of (Ni54 Mn25 Ga21 )100− x B x alloys were investigated. The results showed that the martensitic transformation start temperatures M s decreased monotonically from 465 K for x = 0–278 K for x = 3. Boron addition refined the grain and significantly enhanced the mechanical properties. The compressive fracture strain of 22.3% and reversible strain of 6.8% were obtained in (Ni54 Mn25 Ga21 )99.5 B0.5 alloy. Highlights: The effects of boron addition on the properties of NiMnGaB HTSMA were investigated. Boron addition refined the grain and enhanced the mechanical properties of NiMnGaB alloys. The maximum SME value of 6.8% was obtained in (Ni54 Mn25 Ga21 )99.5 B0.5 alloy with pre-stain of 10%.