Heat capacities of aluminium alloys

Zahra, A.‐M.; Zahra, C. Y.; Jaroma-Weiland, G.; Neuer, G.; Lacom, W.

doi:10.1007/bf00354407

Cited by 18 publications

(6 citation statements)

References 18 publications

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“…8 presents the evolution of the specific heat of CMFs during the heating process in the temperature ranging from 0 C to 400 C. A linear variation can be seen in the specific heat of both Al-S CMF and SeS CMF samples at various temperatures. A positive deviation from linear behavior is observed in Al-S CMF samples beginning around 200 C, which is an indication of dissolution of Si precipitation in the Al matrix during the heating process according to the Neumann-Kopp rule [24]. As indicated in Fig.…”

Section: Resultsmentioning

confidence: 93%

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Chen

Marx

Rabiei

2016

International Journal of Thermal Sciences

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a b s t r a c tA comprehensive experimental and computational evaluation of thermal behavior and fire retardant properties of composite metal foams (CMFs) is reported in this study. Thermal behavior characterizations were carried out through specific heat, effective thermal conductivity, and coefficient of thermal expansion analyses using differential scanning calorimetry, high temperature guarded-comparativelongitudinal heat flow technique, and thermomechanical analyzer (TMA), respectively. The experimental results were compared with analytical results obtained from, respectively, rule of mixture, Brailsford and Major's model, and modified Turner's model for verification. United States Nuclear Regulatory Commission (USNRC) standards were employed as regulatory standards and criteria for fire retardant property study. The results revealed a superior thermal resistance and fire survivability of CMFs compared to 304L stainless steel. A physics-based three-dimensional model accounting for heat conduction was built using Finite Element Analysis to validate the reliability of the experimental results. The model led to a good reproduction of the experimentally measured data when comparing CMF to bulk stainless steel. This research indicates that one of the potential applications of lightweight CMFs can be in nuclear spent fuel casks replacing conventional structural and radiation shielding materials with demonstrated benefits of excellent thermal isolation, fire retardant, light weight and energy absorption capabilities.

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Section: Resultsmentioning

confidence: 93%

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Chen

Marx

Rabiei

2016

International Journal of Thermal Sciences

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“…Guinier-Preston (GP) region reversion (Arockiasamy et al, 2010;Liu et al, 2015;Ghosh and Gao, 2011;Wu et al, 2014) and ( MgZn2) can be suggested as stable resolution (Zahra et al, 1995;Richard and Adler, 1977). At temperature ranges of 350°C-390°C and 490°C-530°C, endothermic peaks can be related to u (Al 2 CuMg) dissolving reactions.…”

Section: Resultsmentioning

confidence: 99%

The effect of borax addition to aluminum alloy produced by powder metallurgy on mechanical and thermophysical properties

Mutlu

Acar

Gizir

2021

ACMM

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Purpose Lightweight, durable and economical materials production has gained considerable importance according to the needs of developing technology. The purpose of this paper is to develop an new aluminum alloy by powder metalurgy. Design/methodology/approach Powder metallurgy, which provides controllably on desired end product, method was applied. Aluminum alloy was created with Al, Zn, Mg, Cu powders and 1.5% Na2[B4O5(OH)4].8H2O added. It was pressed under high pressure and sintered at 600 °C under N2 gas atmosphere. Density, hardness behaviors and thermal properties were determined. Surfaces and crystal structures of samples were characterized. Findings The addition of borax made easier grains coming to together, acting as binders and the AlB2 crystal phase was formed. It was also observed that MgZn2, Al2CuMg phases were formed. In this way, the pores between the particles of the material were reduced from 35% to 5% total porosity and the hardness of the material was increased 29 N/mm2 to 45 N/mm2 (Brinell Hardness, HB). The surface properties improved and the hydrophobicity of the surface (from 63° to 102° contact angle with borax) increased. Thus, the heat transfer among atoms get easier and the borax addition decreased specific heat capacity and enthalpy of aluminum–borax samples. This situation was also simulated with the heat transfer module of COMSOL. As result, the energy required reduced. In the other word, sintering process occurred at low temperature and more efficient. Originality/value New aluminum alloy has been created from different amounts of Zn, Mg, Cu elemental powders. In addition to literature, relationship of borax and aluminum and other alloying elements on the mechanical, thermophysical and surface properties of new obtained aluminum alloy has been investigated.

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“…In reality, C m varies with temperature [99]; also for large dose, enthalpy associated with phase changes must be included. MARS includes the effect of temperature-dependent specific heat [100]; however, the temperature excursion must be below the melting point.…”

Section: -292 Energy Deposition Simulationsmentioning

confidence: 99%

Advanced Photon Source Upgrade Project Final Design Report

Fornek

2019

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Heat capacities of aluminium alloys

Cited by 18 publications

References 18 publications

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

The effect of borax addition to aluminum alloy produced by powder metallurgy on mechanical and thermophysical properties

Advanced Photon Source Upgrade Project Final Design Report

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