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Träfflista för sökning "WFRF:(Jiang Zhihua) srt2:(2021)"

Sökning: WFRF:(Jiang Zhihua) > (2021)

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1.
  • Dong, Zhihua, et al. (författare)
  • Invariant plastic deformation mechanism in paramagnetic nickel-iron alloys
  • 2021
  • Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 118:14
  • Tidskriftsartikel (refereegranskat)abstract
    • The Invar anomaly is one of the most fascinating phenomena observed in magnetically ordered materials. Invariant thermal expansion and elastic properties have attracted substantial scientific attention and led to important technological solutions. By studying planar faults in the high-temperature magnetically disordered state of Ni1-cFec, here we disclose a completely different anomaly. An invariant plastic deformation mechanism is characterized by an unchanged stacking fault energy with temperature within wide concentration and temperature ranges. This anomaly emerges from the competing stability between the face-centered cubic and hexagonal close-packed structures and occurs in other paramagnetic or nonmagnetic systems whenever the structural balance exists. The present findings create a platform for tailoring high-temperature properties of technologically relevant materials toward plastic stability at elevated temperatures.
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2.
  • Dong, Zhihua, et al. (författare)
  • Thermo-mechanical properties of Cr-Co-Ni alloys from longitudinal spin fluctuation theory
  • 2021
  • Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 119:8
  • Tidskriftsartikel (refereegranskat)abstract
    • Accounting for longitudinal spin fluctuations in the paramagnetic state, we calculate elastic constants and stacking fault energy as a function of temperature and chemical composition for Cr-Co-Ni alloys. The longitudinal spin fluctuations are demonstrated to be important for the quantitative description of the thermo-mechanical properties and the corresponding chemical and temperature dependences. Replacing Ni with Cr and Co is found to yield opposite influence on the mechanical properties at finite temperature. A high thermal stability in plasticity is predicted in the low Cr regime in Cr-Co-Ni alloys, while a good thermal stability in elasticity can be achieved in the high Cr and low Co regime. The present advance in thermo-chemical-magnetic-property enhances the understanding required for an intelligent design of multicomponent alloys toward high-technology applications. Published under an exclusive license by AIP Publishing.
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Dong, Zhihua (2)
Vitos, Levente (2)
Jiang, Bin (2)
Schönecker, Stephan (1)
Li, Wei (1)
Li, Qian (1)
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2021 (2)Ta bort avgränsningen

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