The effect of high magnetic field on phase stability in Fe-Ni

Nicholson, D. M. C.; Kisner, R.A.; Ludtka, Gerard M.; Sparks, C. J.; Petit, L.; Jaramillo, Roger A; Mackiewicz-Ludtka, G.; Wilgen, J. B.; Sheikh‐Ali, A.D.; Kalu, Peter N.

doi:10.1063/1.1689761

Cited by 10 publications

(7 citation statements)

References 7 publications

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“…In conclusion, let us note that the authors of [16][17][18][19][20] have already mentioned that the applied magnetic field should be added to the list of the known thermodynamic variables. They also showed examples where the application of an external magnetic field results in the new T-c paths of an alloy evolution.…”

Section: Resultsmentioning

confidence: 99%

“…The evaluation of thermodynamic changes induced by the applied magnetic-field effects on the local magnetic moments showed [17] …”

Section: Resultsmentioning

confidence: 99%

“…It was noted earlier [16] that the strong magnetic fields (up to 30-40 T) may significantly affect the phase transformations, similarly to high pressures or elevated temperatures. Previous investigations [17][18][19] proved that in f.c.c.-Ni-Fe and b.c.c.-Fe-Ni alloys with a high Fe content (>70 at.%) the starting temperature of martensitic transformation (f.c.c. ↔ b.c.c.…”

Section: Introductionmentioning

confidence: 97%

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Thermodynamics of f.c.c.-Ni–Fe Alloys in a Static Applied Magnetic Field

Vernyhora

Tatarenko

Bokoch

2012

ISRN Thermodynamics

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Within the scope of the self-consistent field and mean ("molecular") self-consistent field approximations, applying the static concentration wave method, the thermodynamics of f.c.c.-Ni-Fe alloys undergoing the static applied magnetic field effects is studied in detail. Under such conditions, the analytical corrections to expressions for the configuration-dependent part of free energy of macroscopically ferromagnetic L1 2 -Ni 3 Fe-type or L1 0 -NiFe-type ordering phases are taken into account. The obtained results for thermodynamically equilibrium states are compared with the refined phase diagram for f.c.c.-Ni-Fe alloys calculated recently without taking into account the applied magnetic field effects. Considering the specific character of microscopic structure of the magnetic and atomic orders in f.c.c.-Ni-Fe alloys, the changes of shape (and in arrangement) of order-disorder phase-transformation curves (Kurnakov points) are thoroughly analysed. A special attention is addressed to the investigation of the concentration, temperature, and magnetic-field induction-dependent atomic and magnetic long-range order parameters, especially, near their critical points. As revealed unambiguously, influence of a static applied magnetic field promotes the elevation of Kurnakov points for all the atomically ordering phases that is in an overall agreement with reliable experimental data. On the base of revealed phenomenon, the magneto external field analog-to-digital converter of the monochromatic radiations (X-rays or thermal neutrons) is hypothesized as a claim.

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Section: Resultsmentioning

confidence: 99%

“…The evaluation of thermodynamic changes induced by the applied magnetic-field effects on the local magnetic moments showed [17] …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Thermodynamics of f.c.c.-Ni–Fe Alloys in a Static Applied Magnetic Field

Vernyhora

Tatarenko

Bokoch

2012

ISRN Thermodynamics

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“…Work in ferrous materials has demonstrated that high magnetic field processing (HMFP) can induce meaningful changes in kinetics, phase equilibria, and solubility limits in the solid state. [1][2][3] These processing routes can result in modified microstructures that, for example, retain alloying elements in solution. This potentially negates the need for a solution heat treatments and/or increase maximum solid solubility limits, improving the strength of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Thermomagnetic Processing of Aluminum Alloys During Heat Treatment

et al. 2020

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Processing materials under magnetic fields is an underexplored technique to improve structure and mechanical properties in metals and alloys. Magnetic fields can alter phase stability, modify diffusion characteristics, and alter material flow substantially. In castings, magnetic fields can be used during melting of the alloy, during solidification, or during postprocessing operations such as heat treatment to achieve structural changes. This work investigates the effectiveness of thermomagnetic processing during heat treatment of Al alloys containing in the Al-Cu, Al-Si-Cu, and Al-Mg-Ce systems. We demonstrate an improvement in mechanical properties and a reduction in required heat treatment times for all alloys.

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“…It allows the customization of the structure of the material at micro-scale and nano-scale levels in order to tailor the properties and performance of the material. Thermomagnetic processing technology has been successfully used with alloys to selectively control microstructure stability and phase transformation kinetics [91][92][93] . However, the utilization of this technology with polymeric materials has not been fully explored, and therefore the ability to control molecular orientation of the polymer matrix in advanced composites is expected to enable unique mechanical, thermal, and electric properties of structural and functional composites.…”

Section: Introductionmentioning

confidence: 99%

Nano-Zirconium Tungstate Reinforced Liquid Crystalline Thermosetting Composites with Near Zero Thermal Expansion

Kessler¹,

Li²,

Constant³

2015

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Air Force Materiel Command REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to the Department of Defense, Executive Service Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR ABSTRACTOne crucial factor limiting the performance of polymer matrix composites is their relatively high coefficient of thermal expansion (CTE), which impacts the dimensional stability of these materials. This report described the synthesis and characterization of zirconium tungstate (ZrW2O8) nanoparticles with negative CTE and their applications in an epoxy resin to produce low CTE nanocomposites. This work also described the synthesis and characterization of a unique class of thermosets known as liquid crystalline epoxy resins (LCERs) for the development of advanced polymer matrices for high performance composites. Results showed that it was possible to control structure and the resulting functionality of the LCERs by curing the synthesized epoxy monomer with appropriate curing agents. Highly crosslinked LCERs exhibited a self-reinforcing effect because of the self-organized liquid crystalline phase and are promising candidates for the polymer matrices in structural composites. Lightly crosslinked LCERs exhibited a triple shape memory effect and are excellent candidates for the development of multifunctional polymer composites. 5a. CONTRACT NUMBER. Enter all contract numbers as they appear in the report, e.g. F33615-86-C-5169. SUBJECT TERMS5b. GRANT NUMBER. Enter all grant numbers as they appear in the report, e.g. AFOSR-82-1234. 5c. PROGRAM ELEMENT NUMBER.Enter all program element numbers as they appear in the report, e.g. 61101A.5d. PROJECT NUMBER. Enter all project numbers as they appear in the report, e.g. 1F665702D1257; ILIR.5e. TASK NUMBER. Enter all task numbers as they appear in the report, e.g. 05; RF0330201; T4112.5f. WORK UNIT NUMBER. Enter all work unit numbers as they appear in the report, e.g. 001; AFAPL30480105. AUTHOR(S). Enter name(s) of person(s)responsible for writing the report, performing the research, or credited with the content of the report. The form of entry is the last name, first name, middle initial, and additional qualifiers separated by commas, e.g. Smith, Richard, J, Jr. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES).Self-explanatory. PERFORMING ORGANIZATION REPORT NUMBER.Enter all unique alphanumeric report numbers assigned by the perf...

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The effect of high magnetic field on phase stability in Fe-Ni

Cited by 10 publications

References 7 publications

Thermodynamics of f.c.c.-Ni–Fe Alloys in a Static Applied Magnetic Field

Thermodynamics of f.c.c.-Ni–Fe Alloys in a Static Applied Magnetic Field

Thermomagnetic Processing of Aluminum Alloys During Heat Treatment

Nano-Zirconium Tungstate Reinforced Liquid Crystalline Thermosetting Composites with Near Zero Thermal Expansion

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