Effect of second-phase particles on shape memory in Fe–Mn–Si-based alloys

Improvement of shape memory effect in Fe–Mn–Si alloy by slight tantalum addition

“…These features demonstrate that the deformation-induced defects are preferential sites for nucleation of precipitates. The precipitation behavior of alloy A has been discussed previously [27], and the occurrence of pre-deformation aligned precipitates is consistent with the reported studies [23,35].…”

Characterization of the deformation and phase transformation behavior of VC-free and VC-containing FeMnSi-based shape memory alloys by in situ neutron diffraction

“…The precipitates are also assumed to increase the strength of the austenite and, then, effectively prevent slip deformation [5]. In other works, the influence of VC or VN [13,14], TiC [15] as well as Cr23C6 [16] precipitates on the SME was investigated. Even though improved shape memory properties were reported for all these alloys containing different kinds of precipitates, Stanford and Dunne put the explanation of many studies in question [17].…”

Key Factors Achieving Large Recovery Strains in Polycrystalline Fe–Mn–Si‐Based Shape Memory Alloys: A Review

“…These aligned Cr 23 C 6 particles could reduce and even suppress the collisions between HCP martensite bands (Figure ), which was the reason for improving SME . Moreover, Stanford et al revealed that second‐phase precipitates less than 30 nm in diameter had a negative effect on SME, while the ones larger than 50 nm had a positive effect . In addition, Peng et al reported that the trained and thermal‐mechanically treated Fe–14Mn–5Si–8Cr–4Ni–0.12C alloy containing Cr 23 C 6 precipitates had a larger maximun recovery strain than the trained and thermal‐mechanically treated Fe–14Mn–5Si–8Cr–4Ni alloy without Cr 23 C 6 precipitates, respectively…”