Tracer diffusion in the σ phase of the CoCrFeMnNi system

Zhang, Jingfeng; Muralikrishna, G. Mohan; Asabre, Alex; Kalchev, Yordan; Müller, Julian; Butz, Benjamin; Hilke, Sven; Rösner, Harald; Laplanche, Guillaume; Divinski, Sergiy V.; Wilde, Gerhard

doi:10.1016/j.actamat.2020.116498

Cited by 29 publications

(2 citation statements)

References 59 publications

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“…Similar to the SEM results ( Figure 5 c), a large number of fine particles can be found in the FCC matrix ( Figure 6 a). The selected area electron diffraction (SAED) patterns in the red rectangle region confirm that the σ particle has a tetragonal structure [ 30 , 31 ]. The high-resolution transmission electron microscopy (HRTEM) of the phase interface between the FCC matrix and σ particle is presented in Figure 6 b, revealing an incoherent relationship between the two phases.…”

Section: Resultsmentioning

confidence: 99%

Effect of Si on Microstructure and Mechanical Properties of FeCrNi Medium Entropy Alloys

Ding

Cao

et al. 2023

Materials

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FeCrNi medium entropy alloy (MEA) has been widely regarded for its excellent mechanical properties and corrosion resistance. However, insufficient strength limits its industrial application. Intermetallic particle dispersion strengthening is considered to be an effective method to improve strength, which is expected to solve this problem. In this work, microstructural evolution and mechanical behavior of FeCrNi MEA with different Si content were investigated. We found that the precipitation of fine σ particles can be formed in situ by thermomechanical treatment of Si doping FeCrNi MEAs. The FeCrNiSi0.15 MEA exhibits a good combination of strength and ductility, with yield strength and tensile elongation of 1050 MPa and 7.84%, respectively. The yield strength is almost five times that of the as-cast FeCrNi MEA. The strength enhancement is mainly attributed to the grain-boundary strengthening and precipitation strengthening caused by fine σ particles.

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Section: Resultsmentioning

confidence: 99%

Effect of Si on Microstructure and Mechanical Properties of FeCrNi Medium Entropy Alloys

Ding

Cao

et al. 2023

Materials

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“…Earlier attempts to produce the Cr 26 Mn 20 Fe 20 Co 20 Ni 14 HEA (lowest SFE) in bulk form with a recrystallized microstructure showed that a high Cr/Ni ratio promotes the formation of the topologically close-packed σ phase [ 25 , 29 ]. Associated with this precipitation was a loss of ductility [ 25 , 26 ] due to the brittle nature of this σ phase [30] . Recently, the phase stability of the Cr 26 Mn 20 Fe 20 Co 20 Ni 14 HEA was investigated in detail by Laplanche et al .…”

Section: Introductionmentioning

confidence: 99%