Erratum to “Study on Ni-Ti alloys around equiatomic composition by the first-principles phase field method” [Comput. Mater. Sci. 191 (2021) 110284]

Ohno, Kaoru; Tsuchiya, M.; Kuwahara, Riichi; Sahara, Ryoji; Bhattacharyya, Swastibrata; Pham, Thi Nu

doi:10.1016/j.commatsci.2021.110574

Cited by 2 publications

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“…In Figure 4c, an interdiffusion layer was observed at Ti/Ni interface. According to Ti-Ni binary phase diagram and the first principle method, [31] the possible intermetallic compounds at Ti/Ni interface are TiNi 3 , TiNi, and Ti 2 Ni in sequence. The existence of the interdiffusion layer indicates that metallurgical bonding occurs at the interface.…”

Section: Effect Of Vacuum Heat Treatment On Microstructure At Ti/ Ni ...mentioning

confidence: 99%

Failure Process Observation and Failure Mechanism of Ni‐Coated TC4 Alloy by Gradually Changed Curvature Bending Method

et al. 2021

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To observe the failure process of coating/substrate materials, a gradually changed curvature bending (GCCB) method is proposed, and the relevant equipment is developed. Before GCCB experiment, Ni-coated Ti6Al4V (TC4) samples were prepared. The effect of vacuum heat treatment on the microstructure at Ti/Ni interface is discussed. With the increase in heat treatment time, intermetallic compounds of TiNi 3 , TiNi, and Ti 2 Ni start to form. Kirkendall void forms in Ni coating at first, and then the pore number decreases due to interdiffusion. Based on the interdiffusion of Ni into TC4 substrate, β-Ti phase forms at the surface region. The whole failure process of Ni-coated TC4 sample by GCCB experiment is observed and analyzed. With the increase in bending curvature, the fracture order of each layer is TiNi 3 > Ti 2 Ni > TiNi. With the increase in heat treatment time, the bonding property of the coating first increases and then decreases, and the failure mode also changes. The failure occurs at TiNi 3 layer when the heat treatment time is 60 min. When the heat treatment time is 120 min, the bonding property of the coating is the highest and surface vertical crack occurs. When treated 180 min, failure occurs at Ti 2 Ni layer.

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Section: Effect Of Vacuum Heat Treatment On Microstructure At Ti/ Ni ...mentioning

confidence: 99%

Failure Process Observation and Failure Mechanism of Ni‐Coated TC4 Alloy by Gradually Changed Curvature Bending Method

et al. 2021

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Microstructures in Iron-rich FeSi Alloys by First-principles Phase Field and Special Quasirandom Structure Methods

et al. 2023

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Coarse grained phase morphologies of iron-rich region of FeSi alloys at 1 050 K are investigated by using first-principles phase field and special quasirandom structure methods without relying on any experimental or empirical information. From the free energy comparison, we find that, for the Si concentration less than 25 at%, a solid-solution-like homogeneous phase is most stable, although a random pattern in nm scale consisting of B2 Fe 4-x Si x and D0 3 Fe 3 Si phases may appear at 12.5 at% Si at somewhat lower temperatures. We make a conjecture that, around 12.5 at% Si, such a random pattern in nm scale is the origin of the zero magnetostriction and low magnetic anisotropy. This solves a long-standing problem of the experimentally observed zero magnetostriction at 6.5 wt% Si. On the other hand, for the Si concentration slightly larger than 25 at%, FeSi alloys prefer two-phase coexistence of the D0 3 Fe 3 Si phase and the B2 FeSi phase. All these findings are in good accordance with the available experimental evidence.

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Erratum to “Study on Ni-Ti alloys around equiatomic composition by the first-principles phase field method” [Comput. Mater. Sci. 191 (2021) 110284]

Cited by 2 publications

References 0 publications

Failure Process Observation and Failure Mechanism of Ni‐Coated TC4 Alloy by Gradually Changed Curvature Bending Method

Failure Process Observation and Failure Mechanism of Ni‐Coated TC4 Alloy by Gradually Changed Curvature Bending Method

Microstructures in Iron-rich FeSi Alloys by First-principles Phase Field and Special Quasirandom Structure Methods

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