High temperature mechanical properties of low alloy steel foams produced by powder metallurgy

Bekoz, Nuray; Oktay, Enver

doi:10.1016/j.matdes.2013.07.050

Cited by 28 publications

(9 citation statements)

References 31 publications

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“…Ainda que o processo de fabricação das espumas de esferas de aço ocas seja mais oneroso devido aos custos energéticos acrescidos derivados do ponto de fusão mais alto do aço, a performance mecânica sob altas temperaturas é claramente superior à do alumínio. A mesma observação foi constatada no trabalho de BekozeOktay [13].…”

Section: Espuma De Alumíniounclassified

“…Considerando a elevada área específica das espumas metálicas, as reações químicas poderão ter um impacto significativamente positivo na performance termo-mecânica das espumas. BekozeOktay [13] também reportou um aumento na tensão de escoamento e na rigidez de espumas de aço fabricadas pela Metalurgia do Pó com o aumento da temperatura até 400 o C e uma diminuição após essa temperatura. Essa mesma referência aponta o efeito de agehardening como fator de melhoria das propriedades mecânicas verificadas até 400 o C, porém não detectou nenhum aumento de resistência à compressão para temperaturas superiores e velocidades de aplicação de carga mais altas.…”

Section: Espuma De Alumíniounclassified

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Propriedades Mecânicas De Espumas De Aço E Alumínio Sob Altas Temperaturas

Tavares¹,

Vieira²,

Almeida³

et al. 2019

ABM Proceedings

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Resumo No presente trabalho são avaliadas e discutidas as propriedades mecânicas de espumas metálicas de aço e alumínio de porosidade fechada sob altas temperaturas.As espumas metálicas são metais celulares que podem ser aplicados, por exemplo, como núcleos de painéis sanduíche para a construção leve ou absorvedores de impacto graças à alta compressibilidade deste tipo de materiais (até 90% de deformação).Foram testadas à compressão espumas compostas por esferas de aço ocas e espumas de alumínio fabricadas pelo processo da Metalurgia do Pó, sujeitas às temperaturas de 24 o C, 100 o C, 150 o C, 200 o C, 300 o C, 400 o C, 500 o C, 550 o C e 700 o C.As espumas de aço mantiveram as suas propriedades até 400 o C, enquanto que as espumas de alumínio viram suas propriedades se degradarem apenas para 150 o C. Apesar dos fatores de redução da tensão de platô terem seguido a mesma tendência do Eurocode verificadas para o aço e alumínio sólido, a oxidação do ferro registrada entre 150 e 300 o C produziu uma coloração azul nas espumas de aço, resultando em um aumento da sua rigidez para esse intervalo de temperaturas. Palavras-chave:Espumas de aço; Espumas de alumínio; Análise térmica;Compressão.

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Section: Espuma De Alumíniounclassified

Propriedades Mecânicas De Espumas De Aço E Alumínio Sob Altas Temperaturas

Tavares¹,

Vieira²,

Almeida³

et al. 2019

ABM Proceedings

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“…Due to the low particle packing characteristics of the green compacts made of agglomerated particles, there are more macro-pores and localized defects in the sintered samples fully made of agglomerates, and thus, these structures tend to be weaker under compressive stress. Typically, the deformation mode, resulting from repeatable failure of the pore layers, produces a very uneven character of the stress-strain curve [23].…”

Section: Compressive Mechanical Properties Of Graded Porous Scaffoldsmentioning

confidence: 99%

Functionally graded porous scaffolds made of Ti-based agglomerates

Nazari

Hilditch

Dargusch

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

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Mono- and double-layer porous scaffolds were successfully fabricated using ball-milled agglomerates of Ti and Ti-10Nb-3Mo alloy. For selectively controlling the level of porosity and pore size, the agglomerates were sieved into two different size fractions of 100-300μm and 300-500μm. Compressive mechanical properties were measured on a series of cylindrical sintered compacts with different ratios of solid core diameter to porous layer width. The graded porous scaffolds exhibited stress-strain curves typical for metallic foams with a defined plateau region after yielding. The compressive strengths and elastic moduli ranged from 300 to 700MPa and 14 to 55GPa, respectively, depending on the core diameter and the material used. The obtained properties make these materials suitable for load-bearing implant applications.

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“…The resistance of stainless steels against corrosion is provided by the chromium alloy. The chromium alloy forms an oxide layer by clinging to the surface of the stainless steel, and thanks to this layer, it gains resistance to environments such as chloride and acid [5][6][7]. Apart from chromium, other alloying elements are added to improve the properties of stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of V Particles Added to Steels Manufactured by Powder Metallurgy

Erden

Akkaş

2023

ICCAR

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Powder metallurgy (PM) production method is one of the widely used production methods. With the PM method, it has many features such as less material loss, easy production of complex parts, and secondary processing is generally not required. Stainless steels are the development of low-alloyed or unalloyed steels. Stainless steels are widely used in industry and biomaterial fields due to their advanced properties such as superior mechanical properties, resistance to corrosion, and use as a biomaterial. Graphite, iron, titanium, vanadium and tungsten carbide were used in this study. By PM method, 0.05 wt% and 0.1% V were added into graphite, iron and titanium powders. The powders were subjected to mechanical alloying process with a mechanical alloying device at 400 rpm for 30 minutes. Samples of each composition were formed by cold pressing the mixed powders with a one-way press device under 700 MPa pressure in the mold produced in ASTM –E8M standards. After pressing, it was sintered for two hours at 1250°C in an argon atmosphere gas environment. Production process, tensile test of finished samples, microstructure analyzes were done.

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High temperature mechanical properties of low alloy steel foams produced by powder metallurgy

Cited by 28 publications

References 31 publications

Propriedades Mecânicas De Espumas De Aço E Alumínio Sob Altas Temperaturas

Propriedades Mecânicas De Espumas De Aço E Alumínio Sob Altas Temperaturas

Functionally graded porous scaffolds made of Ti-based agglomerates

Investigation of the Effect of V Particles Added to Steels Manufactured by Powder Metallurgy

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