TY - JOUR

T1 - Interdiffusion and atomic mobility in hcp Mg–Al–Sn alloys

AU - Zhang, Yuhui

AU - Du, Changfa

AU - Liu, Yuling

AU - Wen, Shiyi

AU - Liu, Shuhong

AU - Huang, Yuanding

AU - Hort, Norbert

AU - Du, Yong

PY - 2021/8/5

Y1 - 2021/8/5

N2 - For the purpose of studying the diffusion behavior of hcp Mg–Al–Sn alloys, several Mg–Al, Mg–Sn and Mg–Al–Sn alloys were prepared and assembled into ten diffusion couples annealed at 723, 773, 823 K separately. With the aid of the electron probe microanalyzer technique and efficient CALTPP (CALculation of ThermoPhysical Properties) software, the composition dependent interdiffusivities at various temperatures were calculated. After that, the atomic mobilities were evaluated according to the obtained diffusivities in conjunction with available thermodynamic descriptions of the system in literature. Extensive comparisons between the model-predicted and experimental data on diffusion behaviors indicate the reliability of the presently obtained kinetic parameters. It worth noting that the measured composition profiles and diffusion paths can be logically predicted merely with two ternary interaction parameters. The currently obtained atomic mobilities will serve the high-throughput computation design for multi-component Mg alloys.

AB - For the purpose of studying the diffusion behavior of hcp Mg–Al–Sn alloys, several Mg–Al, Mg–Sn and Mg–Al–Sn alloys were prepared and assembled into ten diffusion couples annealed at 723, 773, 823 K separately. With the aid of the electron probe microanalyzer technique and efficient CALTPP (CALculation of ThermoPhysical Properties) software, the composition dependent interdiffusivities at various temperatures were calculated. After that, the atomic mobilities were evaluated according to the obtained diffusivities in conjunction with available thermodynamic descriptions of the system in literature. Extensive comparisons between the model-predicted and experimental data on diffusion behaviors indicate the reliability of the presently obtained kinetic parameters. It worth noting that the measured composition profiles and diffusion paths can be logically predicted merely with two ternary interaction parameters. The currently obtained atomic mobilities will serve the high-throughput computation design for multi-component Mg alloys.

KW - Atomic mobility

KW - Diffusion coefficients

KW - Diffusion couple

KW - Mg–Al–Sn alloy

KW - Novel numerical inverse method

KW - Ternary diffusivities

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85102879977&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/b8476a1d-c035-324a-86f4-9f8754a01666/

U2 - 10.1016/j.jallcom.2021.159517

DO - 10.1016/j.jallcom.2021.159517

M3 - Journal articles

AN - SCOPUS:85102879977

VL - 871

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

M1 - 159517

ER -