Spray forming of Cu–11.85Al–3.2Ni–3Mn (wt%) shape memory alloy

Cava, R.D.; Bolfarini, Claudemiro; Kiminami, Cláudio Shyinti; Mazzer, Eric M.; Filho, Walter José Botta; Gargarella, Piter; Eckert, J.

doi:10.1016/j.jallcom.2013.11.166

Cited by 38 publications

(29 citation statements)

References 11 publications

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“…This so called intermediate or R martensite is coherent with β 1 as well as with the martensites β´1 and γ´1 44 . Several works have been dedicated to polycrystalline CuAlNi SMAs 2,[4][5][6][7][8][12][13][14][15]34,41,43,45,47,49 , yet, most fundamental works are devoted to single crystals. However, practical applications might require polycrystalline SMA components [57][58][59] .…”

Section: Introductionmentioning

confidence: 99%

“…However, practical applications might require polycrystalline SMA components [57][58][59] . In these cases, depending on the alloy composition, processing condition and initial grain size as well as thermal and/or mechanical treatment, different RMT parameters related to microstructure and properties are obtained 41,43,45,[47][48][49] . In particular, Sari and Kirindi 41 investigated the microstructure and compression properties of a Cu-11.92 wt.%Al-3.78 wt.%Ni alloy produced by arc-melting.…”

Section: Introductionmentioning

confidence: 99%

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Martensitic Transformation Under Compression of a Plasma Processed Polycrystalline Shape Memory CuAlNi Alloy

et al. 2017

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Shape memory alloys (SMA) are attracting considerable attention owing to possible applications from biomedical to aerospace. In particular, CuAlNi alloys present significant advantages associated with low cost, easy processing and superior thermo-electric conductivity over other SMAs such as the NiTi alloys. Characterization of some properties and structural changes caused by martensitic transformation are still open to investigation. The present work evaluated these characteristics in an as-cast plasma processed shape memory Cu-14wt.%Al4wt.%Ni, which was compression tested until fracture. Experimental results showed that an as-cast ingot presents not only chemical and phase homogeneity, but also microstructures composed of grains with martensitic morphology. Martensites β' 1 and γ' 1 , as well as intermediary martensitic R and high temperature β 1 were identified by X-ray diffraction tests. It was found that the compressive deformation does not interfere in the phase composition and martensite morphology. However, compression changes the volumetric fractions and crystallographic orientation of the martensites. The mechanical behavior is characterized by an apparent elastic response until the fracture. The fractured surface exhibits brittle aspect like "river patterns" and evidence of intergranular rupture.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Martensitic Transformation Under Compression of a Plasma Processed Polycrystalline Shape Memory CuAlNi Alloy

et al. 2017

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“…Ligas com memória (LMF) de forma caracterizam-se como ligas que apresentam o efeito de memória de forma (EMF), ou seja, capacidade de retornar a seu formato original após deformação plástica quando aquecidas acima de uma temperatura crítica [1][2] [3] [4]. Essas ligas também apresentam outras características como pseudoelasticidade e alta capacidade de amortecimento [2], as quais possibilitam uma vasta gama de aplicações para essa classe de materiais.…”

Section: Introductionunclassified

“…Essas ligas também apresentam outras características como pseudoelasticidade e alta capacidade de amortecimento [2], as quais possibilitam uma vasta gama de aplicações para essa classe de materiais. Entre as ligas com memória de forma se destacam aquelas à base de Ti e Ni, que apresentam ótimas propriedades mecânicas e excelente biocompatibilidade, e as ligas a base de Cu, que não apresentam propriedades mecânicas elevadas, mas apresentam custo de produção reduzido [3] [5]. Essas ligas apresentam propriedades variadas, as quais culminam com um aumento no potencial para aplicações comerciais [4].…”

Section: Introductionunclassified

Análise Das Perspectivas De Aplicações Das Ligas Com Memória De Forma Por Meio De Levantamento De Patentes

Silva¹,

Kiminami²,

Leiva³

et al. 2017

Anais Do Congresso Anual Da ABM

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ResumoLigas com memória de forma (LMFs) são ligas metálicas capazes de recuperar o seu formato e tamanho original após deformação plástica quando aquecidas acima de uma temperatura crítica. Diversos casos de possíveis aplicações paras as LMF têm sido justificados no campo científico, com alguns poucos casos identificados para aplicação em massa, existindo uma ausência na literatura de uma análise crítica da aplicabilidade das mesmas que leve em consideração aspectos industriais e de mercado. Dessa forma, se faz necessário um estudo mais aprofundado que correlacione as ideias científicas geradas com a produção industrial e com a comercialização de LMFs. Nesse contexto, o trabalho visa através de levantamento e análise de patentes e artigos científicos, assim como por contatos industriais, estabelecer uma relação entre o desenvolvimento científico e o comercial das LMFs. Mais de 11 mil artigos e mais de 7 mil patentes foram produzidos nos últimos 16 anos, sendo observado uma tendência crescente da criação de conhecimento de LMF, o qual já vem sendo aplicado na indústria, justificando assim os esforços observados no campo científico. A área biomédica se destaca como a mais bem estabelecida no campo das LMF, com destaque para a utilização das ligas a base de NiTi. Palavras-chave: Ligas com memória de forma; Aplicabilidade; Patentes; Indústria. ANALYSIS OF SHAPE MEMORY ALLOYS APPLICATION PERSPECTIVE BY SURVEY AND ANALYSIS OF PATENTS AbstractShape Memory Alloys (SMA) are metallic alloys capable of recovering their original shape and size after plastic deformation when heated above a critical temperature. Many potentials applications have been justified in scientific field, with just few of them being for mass application. There is an absence in the literature of an analysis about applicability of SMAs, which takes into account industrial and market aspects. Thus, a further study is necessary in order to correlate the scientific ideas generated with the industrial production and commercialization of the SMAs. In this context, the present work aims through survey and analysis of patents and scientific papers, as well as through industrial contacts, stablish a relationship between the scientific and the commercial development of SMAs. More than 11 thousand articles and more than 7 thousand patents were produced in the last 16 years. It was observed a growing tendency of knowledge creation about SMAs, which is already being applied in industrial field, justifying the efforts observed in scientific field. The biomedical area stands out as the most well-stablished in the production of SMA, and the NiTi SMA stands out as the SMA most used on the industry overall.

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“…In recent years, spray forming has been widely used to design and prepare various high-performance alloys. For instance, FGH95 superalloy [4], AA7050 alloy [5], Al−50Si (wt%) alloy [6], and Cu−11.85Al−3.2Ni−3Mn (wt%) shape memory alloy [7] exhibit fine and uniform microstructures as well as good mechanical properties when prepared by spray forming.…”

Section: Introductionmentioning

confidence: 99%

Simulation of jet-flow solid fraction during spray forming

Lü

et al. 2017

Int J Miner Metall Mater

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A numerical model was developed to simulate the jet-flow solid fraction of W18Cr4V high-speed steel during spray forming. The whole model comprises two submodels: one is an individual droplet model, which describes the motion and thermal behaviors of individual droplets on the basis of Newton's laws of motion and the convection heat transfer mechanism; the other is a droplet distribution model, which is used to calculate the droplet size distribution. After being verified, the model was used to analyze the effects of parameters, including the initial gas velocity, deposition distance, superheat degree, and the ratio of gas-to-metal mass flow rates, on the jet-flow solid fraction. Finally, an equation to predict the jet-flow solid fraction directly and conveniently according to the parameters was presented. The values predicted by the equation show good agreement with those calculated by the numerical model.

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Spray forming of Cu–11.85Al–3.2Ni–3Mn (wt%) shape memory alloy

Cited by 38 publications

References 11 publications

Martensitic Transformation Under Compression of a Plasma Processed Polycrystalline Shape Memory CuAlNi Alloy

Martensitic Transformation Under Compression of a Plasma Processed Polycrystalline Shape Memory CuAlNi Alloy

Análise Das Perspectivas De Aplicações Das Ligas Com Memória De Forma Por Meio De Levantamento De Patentes

Simulation of jet-flow solid fraction during spray forming

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