Annealing effect on martensitic transformation of severely cold-rolled Ti50Ni40Cu10 shape memory alloy

Lin, Kaifan; Wu, S.K.

doi:10.1016/j.scriptamat.2006.12.016

Cited by 14 publications

(5 citation statements)

References 29 publications

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“…In our previous study [13], DMA has been confirmed to be more suitable than DSC for investigating the transformation behavior of Ti 50 Ni 40 Cu 10 SMA because DMA test can exhibit significant tan d peaks and deep storage modulus (E 0 ) minima for both B2 / B19 and B19 / B19 0 transformations. Thus, DMA test was further conducted on as solution-treated Ti 49 Ni 41 Cu 10 SMA to reveal the existence of B19 / B19 0 transformation, as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Among ternary TiNi-based SMAs, Ti 50 Ni 50Àx Cu x SMAs with x < 30 at.% have been investigated extensively from various aspects, such as SME [2][3][4], martensitic transformation behaviors [5], mechanical characteristics, microstructures [6][7][8], internal friction [9][10][11][12][13], etc. The substitution of Cu for Ni in TiNi SMAs has been known to reduce the composition sensitivity for M s , the starting temperature of martensitic transformation, and to prevent the precipitation of Ti 3 Ni 4 precipitates.…”

Section: Introductionmentioning

confidence: 99%

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Multi-stage transformation in annealed Ni-rich Ti49Ni41Cu10 shape memory alloy

Lin

2010

Intermetallics

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-stage transformation in annealed Ni-rich Ti49Ni41Cu10 shape memory alloy

Lin

2010

Intermetallics

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“…However, these processes cannot produce bulk samples for mechanical tests, especially the techniques that produce thin films or compositionally graded samples, which usually display different properties from bulk samples [9]. Research on SMAs development has traditionally been performed mainly using vacuum arc, plasma, or vacuum induction melting, and Self-propagation High-temperature Synthesis (SHS) to create bulk samples [10][11][12][13][14]. For the majority of the melting/re-melting techniques, homogenisation heat treatments are usually required to reduce the gravity segregation associated with the process [10].…”

Section: Introductionmentioning

confidence: 99%

“…Research on SMAs development has traditionally been performed mainly using vacuum arc, plasma, or vacuum induction melting, and Self-propagation High-temperature Synthesis (SHS) to create bulk samples [10][11][12][13][14]. For the majority of the melting/re-melting techniques, homogenisation heat treatments are usually required to reduce the gravity segregation associated with the process [10]. Although large samples can be produced, the melting techniques are far from being high-throughput due to the long processing times.…”

Section: Introductionmentioning

confidence: 99%

Suspended droplet alloying: A new method for combinatorial alloy synthesis; nitinol-based alloys as an example

Adkins

McCain

et al. 2018

Journal of Alloys and Compounds

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A new combinatorial alloy synthesis method (suspended droplet alloying) has been developed as a high-throughput approach for alloy discovery. The method is based on using a laser to melt elemental or alloyed wires fed at a controlled rate to achieve a specific chemistry. In this study, the metallurgical characteristics of alloy buttons created using this technique were assessed for TiNi-based shape memory alloy buttons deposited using pure Ni, Ti, and Cu wires. The microstructural and chemical inhomogeneity was assessed using quantitative electron microscopy and X-ray diffraction. Furthermore, the phase transformation temperatures of the coupons have been compared to cast and heat-treated (reference) samples. In general, the samples displayed a limited local deviation from the target chemistry (±1 wt.%), while displaying a fairly homogeneous microstructure with the expected phase distribution. Post-process homogenisation heat treatments enhanced the phase transformation response, approaching the response obtained from the reference samples.

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“…La temperatura de revenido que se encuentra por debajo de A1 afecta la microestructura y las propiedades mecánicas de los aceros de doble fase [5,6,7], esto debido al proceso de trasformación térmica [8,9,10,11] que se realiza en la martensita (microestructura extremadamente dura y frágil que imposibilita su uso en la mayoría de las aplicaciones para un acero que la contenga), para obtener martensita revenida que es una microestructura que reduce la fragilidad, aumenta la ductilidad y la tenacidad del acero [12,13] esto en el rango de temperaturas elevadas de revenido (400 a 700°C) [14].…”

Section: Introductionunclassified

Influencia en las propiedades mecánicas del acero AISI-SAE 1045 tratado térmicamente con temple a temperatura intercrítica y revenido

Torres¹,

Avila²,

Hernandez³

et al. 2016

Avances

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ResumenEn esta investigación se determinó la influencia en las propiedades mecánicas del acero AISI-SAE 1045 tratado térmicamente con temple a temperatura intercrítica de 760°C, durante 30 minutos y revenido a 400°C, por un periodo de tiempo de 10, 20 y 30 minutos. El número de probetas utilizadas para este trabajo se obtuvieron mediante el método de curvas de varianza. El estudio de los resultados se realizó comparando los datos de los ensayos del material en estado de entrega vs los tratamientos efectuados. Las pruebas efectuadas fueron las de: dureza con el durómetro GNEHM 160 RODI., metalografía óptica convencional con el microscopio óptico metalográfico invertido ZEISS Axio Observer.Z1m, tensión con la máquina universal de ensayos SHIMADZU UH-50A y de impacto Charpy con la máquina SATEC SYSTEMS, INC. Model No. SI-1A. Como resultado de estos tratamientos, se pudo evidenciar martensita revenida a nivel microestructural en las tres temperaturas de revenido utilizadas y un incremento en la dureza y en la resistencia a la tensión y una disminución en la fragilidad para este acero. Palabras claveAceros doble fase, Martensita, Martensita Revenida, Revenido, Temple. AbstractIn this research, it was studied the influence on mechanical properties of AISI-SAE 1045 steel with heat treatment quenching at intercritical temperature of 760° C for 30 minutes and tempering at 400° C, during 10 minutes, 20 minutes and 30 minutes. The number of samples used for this work obtained by the variance curves method. The results of this study was conducted using comparing the test data of material delivery status vs treatments made. The tests were hardness with GNEHM 160 RODI durometer, conventional optical metallography with the optical metallographic inverted ZEISS Axio Observer.Z1m microscope, tension with SHIMADZU UH50 universal testing machine and Charpy impact with SATEC SYSTEMS, INC. Model No. SI-1A machine. As results of these treatments, tempered martensite was evident microstructural level in the three tempering temperatures used and an increase in hardness and tensile strength and a decrease in fragility to this steel.

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Annealing effect on martensitic transformation of severely cold-rolled Ti50Ni40Cu10 shape memory alloy

Cited by 14 publications

References 29 publications

Multi-stage transformation in annealed Ni-rich Ti49Ni41Cu10 shape memory alloy

Multi-stage transformation in annealed Ni-rich Ti49Ni41Cu10 shape memory alloy

Suspended droplet alloying: A new method for combinatorial alloy synthesis; nitinol-based alloys as an example

Influencia en las propiedades mecánicas del acero AISI-SAE 1045 tratado térmicamente con temple a temperatura intercrítica y revenido

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