Study on preparation and mechanical property of nanocrystalline NiAl intermetallic

Liu, Eryong; Jia, Junbo; Bai, Yaping; Wang, Wenzhen; Gao, Yimin

doi:10.1016/j.matdes.2013.07.052

Cited by 86 publications

(41 citation statements)

References 24 publications

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“…It is observed that the strain rate sensitivity increases with increasing strain rate, strain and Cu content [5]. It is thought that the greater strain rate sensitivity is the result of a rapid multiplication of dislocations [30][31][32] in the deformed microstructure under an increased strain rate and the blocking of these dislocations by secondary phases precipitated under higher levels of Cu addition.…”

Section: Strain Rate Effectmentioning

confidence: 99%

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Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents

Chen

2016

Applied Sciences

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Abstract:The deformation behavior and fracture characteristics of NiAl intermetallic alloy containing 5~7 at% Cu are investigated at room temperature under strain rates ranging from 1ˆ10´3 to 5ˆ10 3 s´1. It is shown that the copper contents and strain rate both have a significant effect on the mechanical behavior of the NiAl alloy. Specifically, the flow stress increases with an increasing copper content and strain rate. Moreover, the ductility also improves as the copper content increases. The change in the mechanical response and fracture behavior of the NiAl alloy given a higher copper content is thought to be the result of the precipitation of β-phase (Ni,Cu)Al and γ'-phase (Ni,Cu) 3 Al in the NiAl matrix.

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Section: Strain Rate Effectmentioning

confidence: 99%

“…NiAl intermetallic alloy has many favorable properties, including a high mechanical strength, a low density, a high melting point and a good oxidation resistance at high temperature environment [1][2][3][4][5]. As a result, it is an ideal material for structural applications subject to corrosive and oxidant environments [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents

Chen

2016

Applied Sciences

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“…Originally, MA was developed for oxide-dispersion strengthened nickel-and iron-based superalloys, for applications in the aerospace industry [15]. Today, this technique is used to synthesize equilibrium and non-equilibrium materials, such as amorphous alloys [16,17], nanocrystalline materials [18,19], intermetallic compounds [20,21], and supersaturated SSs [22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Guzmán

García

Soliz

et al. 2018

Metals

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Abstract:The aim of this work was to study the synthesis and electrochemical properties of Ti 2 wt %-Si alloys prepared by mechanical alloying (MA) and heat treatment. The MA process was performed under Ar atmosphere. The structural, morphological, and compositional evolutions during the milling and subsequent heat treatment were investigated by X-ray diffraction, energy-dispersive spectroscopy, and scanning electron microscopy. The electrochemical behavior was evaluated by open circuit potential and linear sweep voltammetry measurements. The results showed that the MA process promotes the formation of a supersaturated α-Ti-Si solid solution. During heat treatment, the Si remaining in the mechanically alloyed powders and the Si from the α-Ti-Si supersaturated solid solution reacted with Ti to form Ti-Si intermetallic compounds. These compounds have a fine and homogeneous distribution in the α-Ti matrix, which cannot be achieved by conventional casting methods. Additionally, the electrochemical evaluations revealed that the mechanically alloyed and heat-treated Ti 2 wt %-Si powders have better corrosion resistance in 1.63 M H 2 SO 4 than the pure Ti and MA Ti-Si samples. This is likely due to the particular microstructure produced during the milling and subsequent heat treatment.

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“…Esaki et al [26] and Pabi et al [27] have described the solid-state reactions of mixtures of the elemental Ni and Al powders during MA. It is shown that NiAl with B2 structure is the final state of MA equiatomic mixtures, while MA of mixtures of Ni 3 Al and NiAl 3 gives solid solutions with fcc or bcc structure [28]. On another side, Hwang et al [29] revealed that the mechanically alloyed of 7 at.% of Ti and the equiatomic mixture of elemental Ni and Al also provides alloy with the B2-structure.…”

Section: Introductionmentioning

confidence: 99%

Morphology and structure effect of Ti additive on the solid-state reaction between Ni and Al powders during mechanical alloying

Chérif

Bachaga

Saurina

et al. 2016

Int J Adv Manuf Technol

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In this study, the mixtures of Ni, Al, and Ti elemental powders with nominal compositions Ni-40at.% Al and Ni30at.% Al-10at.% Ti were fabricated by mechanically alloying technique. The structural and morphological changes during high-energy mechanical alloying were investigated by X-ray diffraction and scanning electron microscopy. Differences in the kinetics of solid-state reactions which depend on the differences in the individual properties were found. The final products of the mechanical alloying process were nanocrystalline fcc-Ni(Al) and fcc-Ni(Al, Ti) solid solutions with a mean crystallite sizes in the range of a few nanometers. As a result, although the Ti addition was found to accelerate the formation of the solid solution in Ni-Al alloy, it results in a coarser microstructure.

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Study on preparation and mechanical property of nanocrystalline NiAl intermetallic

Cited by 86 publications

References 24 publications

Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents

Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Morphology and structure effect of Ti additive on the solid-state reaction between Ni and Al powders during mechanical alloying

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