Solid state amorphization in cold drawn Cu/Nb wires

Sauvage, Xavier; Renaud, L; Déconihout, B.; Blavette, D.; Ping, D. H.; Hara, Kazuhiro

doi:10.1016/s1359-6454(00)00338-4

Cited by 145 publications

(77 citation statements)

References 9 publications

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“…SPD also induces various phase transformations [12] such as formation [13][14][15] or decomposition [16][17][18][19][20] of supersaturated solid solution, dissolution of particles of a second solid phase [21][22][23][24][25][26], amorphization [27][28][29][30][31][32] and nanocrystallization [33][34][35]. Among this variety, very interesting are the phase transformations with formation of high-pressure phases.…”

Section: Introductionmentioning

confidence: 99%

The α → ω Transformation in Titanium-Cobalt Alloys under High-Pressure Torsion

Kilmametov

Ivanisenko

Straumal

et al. 2017

Metals

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Abstract:The pressure influence on the α → ω transformation in Ti-Co alloys has been studied during high pressure torsion (HPT). The α → ω allotropic transformation takes place at high pressures in titanium, zirconium and hafnium as well as in their alloys. The transition pressure, the ability of high pressure ω-phase to retain after pressure release, and the pressure interval where α and ω phases coexist depend on the conditions of high-pressure treatment. During HPT in Bridgeman anvils, the high pressure is combined with shear strain. The presence of shear strain as well as Co addition to Ti decreases the onset of the α → ω transition from 10.5 GPa (under quasi-hydrostatic conditions) to about 3.5 GPa. The portion of ω-phase after HPT at 7 GPa increases in the following sequence: pure Ti → Ti-2 wt % Co → Ti-4 wt % Co → Ti-4 wt % Fe.

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Section: Introductionmentioning

confidence: 99%

The α → ω Transformation in Titanium-Cobalt Alloys under High-Pressure Torsion

Kilmametov

Ivanisenko

Straumal

et al. 2017

Metals

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“…On the other hand, the occurrence of amorphous zones on the boundary in the Cu-Nb system was pointed out in [5,6]. In these works, the formation of the amorphous phase was explained by the process of relaxation of mechanical stresses accumulated on the interphase boundary in the process of composite manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Study of the evolution of the Cu/Nb interphase boundary by the molecular dynamics method

2009

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The evolution of atomic structure of the interphase boundary for composites from immiscible Cu/Nb elements is studied by the molecular dynamics method. It is established that the planar interphase boundary is stable at temperatures up to 1200 K. Atomic dissolution of elements is not revealed in the entire examined temperature interval, and the components are mixed on the interphase boundary of finite curvature in the form of clusters and nanolamellas; moreover, the amorphous state is not formed in the process of migration of the interphase boundary.

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“…Furthermore, mechanical deformation from ball-milling and wire drawing has been known to induce chemical mixing even between immiscible metals. [51][52][53] Preservation of two phases allows the layer thickness to limit the grain size, thus facilitating grain refinement to the nanoscales. In addition, the thermal stability of the nanostructure is greatly enhanced by the presence of the Zr-Nb bimetal interfaces in comparison with the single-phase Zr nanograins in cryorolling studies.…”

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confidence: 99%