The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Yongmei M Jin - One of the best experts on this subject based on the ideXlab platform.

  • domain Microstructure Evolution in magnetic shape memory alloys phase field model and simulation
    Acta Materialia, 2009
    Co-Authors: Yongmei M Jin
    Abstract:

    A phase-field micromagnetic microelastic model is employed to simulate domain Microstructure Evolution in magnetic shape memory alloys. The simulations reveal that coupled motions of martensite twin boundaries and magnetic domain walls depend not only on the external magnetic field but also on internal domain configurations. It is shown that a twin boundary can continue its motion under a decreasing magnetic field or even reverse motion direction without changing magnetic field. The domain Microstructure-dependent driving forces for the coupled motions of martensite twin boundaries and magnetic domain walls are analyzed; these explain the complex domain processes and resultant peculiar magnetomechanical behavior of magnetic shape memory alloys.

  • effects of twin boundary mobility on domain Microstructure Evolution in magnetic shape memory alloys phase field simulation
    Applied Physics Letters, 2009
    Co-Authors: Yongmei M Jin
    Abstract:

    Effects of twin boundary mobility on domain Microstructure Evolution during magnetic field-induced deformation in magnetic shape memory alloys are studied by phase field micromagnetic microelastic modeling. The simulations show that different twin boundary mobilities lead to drastically different domain Microstructures and Evolution pathways, yielding very different magnetization and strain responses, even with opposite signs. The study also reveals complex domain phenomena in magnetic shape memory alloys.

Joh F Diehl - One of the best experts on this subject based on the ideXlab platform.

  • systematic study of microwave absorption heating and Microstructure Evolution of porous copper powder metal compacts
    Journal of Applied Physics, 2007
    Co-Authors: Joh F Diehl, Earnie Johnso, Kelly Marti, N M Miskovsky, C T Smith, Gary Weisel, L Weiss, D T Zimmerma
    Abstract:

    We present a systematic study of the absorption, heating behavior, and Microstructure Evolution of porous copper powder metal compacts subjected to 2.45 GHz microwave radiation and explain our observations using known physical mechanisms. Using a single-mode microwave system, we place the compacts in pure electric (E) or magnetic (H) fields and compare the heating trends. We also investigate the effect of particle size on the same. The observed trends and the differences between E- and H-field heating are reflected in the dramatic changes in the conductivity, permittivity, and permeability of the samples. These property changes are effected by the Microstructure Evolution during heating in the two types of fields. We also find that the observed dependence of the initial microwave heating on particle size is suggestive of single-particle behavior.

  • systematic study of microwave absorption heating and Microstructure Evolution of porous copper powder metal compacts
    Journal of Applied Physics, 2007
    Co-Authors: Joh F Diehl, N M Miskovsky, C T Smith, Gary Weisel, Earnie Johnson, Kelly Martin, B L Weiss, D T Zimmerman
    Abstract:

    We present a systematic study of the absorption, heating behavior, and Microstructure Evolution of porous copper powder metal compacts subjected to 2.45 GHz microwave radiation and explain our observations using known physical mechanisms. Using a single-mode microwave system, we place the compacts in pure electric (E) or magnetic (H) fields and compare the heating trends. We also investigate the effect of particle size on the same. The observed trends and the differences between E- and H-field heating are reflected in the dramatic changes in the conductivity, permittivity, and permeability of the samples. These property changes are effected by the Microstructure Evolution during heating in the two types of fields. We also find that the observed dependence of the initial microwave heating on particle size is suggestive of single-particle behavior.

D T Zimmerman - One of the best experts on this subject based on the ideXlab platform.

  • systematic study of microwave absorption heating and Microstructure Evolution of porous copper powder metal compacts
    Journal of Applied Physics, 2007
    Co-Authors: Joh F Diehl, N M Miskovsky, C T Smith, Gary Weisel, Earnie Johnson, Kelly Martin, B L Weiss, D T Zimmerman
    Abstract:

    We present a systematic study of the absorption, heating behavior, and Microstructure Evolution of porous copper powder metal compacts subjected to 2.45 GHz microwave radiation and explain our observations using known physical mechanisms. Using a single-mode microwave system, we place the compacts in pure electric (E) or magnetic (H) fields and compare the heating trends. We also investigate the effect of particle size on the same. The observed trends and the differences between E- and H-field heating are reflected in the dramatic changes in the conductivity, permittivity, and permeability of the samples. These property changes are effected by the Microstructure Evolution during heating in the two types of fields. We also find that the observed dependence of the initial microwave heating on particle size is suggestive of single-particle behavior.

D T Zimmerma - One of the best experts on this subject based on the ideXlab platform.

  • systematic study of microwave absorption heating and Microstructure Evolution of porous copper powder metal compacts
    Journal of Applied Physics, 2007
    Co-Authors: Joh F Diehl, Earnie Johnso, Kelly Marti, N M Miskovsky, C T Smith, Gary Weisel, L Weiss, D T Zimmerma
    Abstract:

    We present a systematic study of the absorption, heating behavior, and Microstructure Evolution of porous copper powder metal compacts subjected to 2.45 GHz microwave radiation and explain our observations using known physical mechanisms. Using a single-mode microwave system, we place the compacts in pure electric (E) or magnetic (H) fields and compare the heating trends. We also investigate the effect of particle size on the same. The observed trends and the differences between E- and H-field heating are reflected in the dramatic changes in the conductivity, permittivity, and permeability of the samples. These property changes are effected by the Microstructure Evolution during heating in the two types of fields. We also find that the observed dependence of the initial microwave heating on particle size is suggestive of single-particle behavior.

Yingjie Yang - One of the best experts on this subject based on the ideXlab platform.

  • effect of strain on Microstructure Evolution of 1cr18ni9ti stainless steel during adiabatic shearing
    Journal of Materials Engineering and Performance, 2016
    Co-Authors: Yingjie Yang, Lihong Jiang, Shuhong Luo, T G Tang, Qingming Zhang
    Abstract:

    Dynamic shear test was conducted on the hat-shaped specimen of the thermo-mechanical-processed 1Cr18Ni9Ti stainless steel by using the split Hopkinson pressure bar at ambient temperature. The effect of the shear strain on the Microstructure Evolution was investigated during adiabatic shearing. The results revealed that the development of adiabatic shear localization went through three stages, including the incubation period, the development stage, and the maturity period. TEM observations showed that the grains in the shear region were elongated, and the elongated grains were gradually evolved into equiaxed nano-grains of 100 nm as shear strain increased. The rotational dynamic recrystallization kinetics calculation showed that subgrains had sufficient time to generate an equiaxed microcrystalline structure by rotation within the deformation time. Based on the observation of the Evolution of dislocations and sub-grains in the adiabatic shear region, a model of the Microstructure Evolution was established during the adiabatic shearing.