Martensitic transformation of Ti50Ni30Cu20 alloy prepared by powder metallurgy

Văleanu, M.; Lucaci, Mariana; Crisan, A.; Sofronie, M.; Leonat, Lucia; Kuncser, V.

doi:10.1016/j.jallcom.2011.01.154

Cited by 24 publications

(13 citation statements)

References 15 publications

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“…The decrease of the magnitudes of temperature change was therefore attributed to formation of a non-transforming PtTi phase. Valeanu et al [43] reported similar effect of milling time in Ti-Ni-Cu mechanically alloyed powders, where martensitic transformation was suppressed after long treatment by high energy ball milling.…”

Section: Martensite Formation In Pt(ti) Milled Powdersmentioning

confidence: 78%

“…Instead, two independent martensitic transformations, B2-B19 and B2-B19 , took place. Furthermore, according to the same study, a longer milling process promoted the formation of a non-transforming phase [43].…”

Section: Introductionmentioning

confidence: 81%

“…A suppression of martensitic transformation in the annealed powders could be related to the grain refinement of the austenite phase in the powder particles [42]. Investigation by Valeanu et al [43] on the martensitic transformation in Ti-Ni-Cu alloys reported the transformation sequence B2-B19-B19 observed in alloys prepared by melting route was no longer valid for the alloys prepared by mixing in a high energy ball mill. Instead, two independent martensitic transformations, B2-B19 and B2-B19 , took place.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Alloying and microstructural changes in platinum–titanium milled and annealed powders

Maweja¹,

Phasha²,

Yamabe‐Mitarai³

2012

Journal of Alloys and Compounds

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Section: Martensite Formation In Pt(ti) Milled Powdersmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Alloying and microstructural changes in platinum–titanium milled and annealed powders

Maweja¹,

Phasha²,

Yamabe‐Mitarai³

2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The increase in the hardness values by mechanical alloying is mainly attributed to the accumulation of strain energy [9,16,18]. Also, it was observed that the material hardness has considerably increased for the samples in which the Ni was replaced with 10 at.…”

Section: Fig1 Calculated Nanoindentation Parameters Of Thermomechanmentioning

confidence: 99%

Shape Memory NiTi and NiTiCu Alloys Obtained by Spark Plasma Sintering Process

Cristea¹,

Lungu²,

Balagurov

et al. 2015

AEF

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Abstract. The addition of Cu to near equiatomic NiTi shape memory alloys (SMAs) can provide some modifications of their shape memory properties by affecting their transformation behavior. The same effect was obtained in the case of Ni 3 Ti 2 and Ni 4 Ti 3 precipitates presence in the microstructure of NiTi. Also the substitution of Cu to NiTi alloys increases the hardness of the materials. This paper presents the microstructural and mechanical investigations of NiTi and NiTiCu alloys obtained by spark plasma sintering (SPS) process that represents a great potential for researchers as a new process for the fabrication of intermetallic compounds.

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“…NiTi-based alloys can be produced by variety of methods including vacuum induction melting [12][13][14][15], sputtering [16], powder metallurgy [17][18][19], mechanical alloying (MA) [19][20][21][22][23][24][25][26], and so on. MA is a simple and low cost solid state process suitable for synthesizing the non-equilibrium states, including nanocrystals, amorphous phases, and supersaturated solid solutions.…”

Section: Introductionmentioning

confidence: 99%

Quantitative phase evolution during mechano-synthesis of Ti–Ni–Cu shape memory alloys

Amini¹,

Alijani²,

Ghaffari³

et al. 2012

Journal of Alloys and Compounds

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a b s t r a c tTi-41Ni-9Cu shape memory alloy was synthesized by mechanical alloying of pure elemental Ti, Ni, and Cu powders using high-energy ball milling. The qualitative and quantitative phase analyses of the asmilled powders were done by X-ray diffraction (XRD) using Rietveld refinement and the alloys microstructure was studied by scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). Concerning the results, by milling evolution, the dissolution of the primary materials occurred at different rates and a considerable amount of the amorphous phase as well as B19 0 -martensite and B2-austenite was created. The formation of Ni solid solution was also evidenced prior to its dissolution. It was found that at sufficient milling time, the mechano-crystallization of the amorphous phase occurred and at the end of milling, the B19 0 -martensite is the dominant phase of the structure.

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Martensitic transformation of Ti50Ni30Cu20 alloy prepared by powder metallurgy

Cited by 24 publications

References 15 publications

Alloying and microstructural changes in platinum–titanium milled and annealed powders

Alloying and microstructural changes in platinum–titanium milled and annealed powders

Shape Memory NiTi and NiTiCu Alloys Obtained by Spark Plasma Sintering Process

Quantitative phase evolution during mechano-synthesis of Ti–Ni–Cu shape memory alloys

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