Phase transitions in metallic alloys driven by the high pressure torsion

Straumal, Boris B.; Korneva, Anna; Zięba, P.

doi:10.1016/j.acme.2013.07.002

Cited by 113 publications

(42 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A decrease in the martensitic transformation kinetics at large strains may also result from a re-distribution of alloying elements assisted by severe plastic deformation. [20] 3.2. Microstructural Evolution During Warm Rolling at 573 K The structural changes during plate rolling at 573 K are illustrated in Figure 5.…”

Section: Microstructural Evolution During Cold Rolling At 293 Kmentioning

confidence: 99%

Effect of Severe Cold or Warm Deformation on Microstructure Evolution and Tensile Behavior of a 316L Stainless Steel

2015

View full text Add to dashboard Cite

The deformation microstructures and mechanical properties of a 316L austenitic stainless steel subjected to large strain cold or warm plate rolling are studied. The cold or warm rolling was carried out at room temperature or 573 K, respectively, to different total true strains up to 3. The structural changes are characterized by the development of nanocrystalline structures with the transverse grain size of about 80 or 160 nm at room temperature or 573 K, respectively. The evolution of nanocrystalline structure under cold working conditions (room temperature) is assisted by the development of mechanical twinning and partial martensitic transformation that result in rapid grain refinement. The development of nanocrystalline structures during cold/warm working is accompanied by significant strengthening. The yield strength approaches 1 680 or 1 070 MPa after cold or warm rolling to a total strain of 3, respectively.

show abstract

Section: Microstructural Evolution During Cold Rolling At 293 Kmentioning

confidence: 99%

Effect of Severe Cold or Warm Deformation on Microstructure Evolution and Tensile Behavior of a 316L Stainless Steel

2015

View full text Add to dashboard Cite

show abstract

“…[26,27] If one would compare the phases in alloys before and after SPD with an equilibrium phase diagram, one could estimate the so-called effective temperature for the SPD treatment. [28,29] The investigation of peculiarities of phase transformations in the SPD-treated Ti-Fe alloys was the goal of this work.…”

Section: Introductionmentioning

confidence: 99%

Phase Transformations in Ti–Fe Alloys Induced by High‐Pressure Torsion

et al. 2015

View full text Add to dashboard Cite

The Ti-Fe alloys are quite important among various Ti-based alloys doped with b-stabilisers. Severe plastic deformation by the high pressure torsion (HPT) leads to the strong grain refinement in Ti-Fe alloys. The high-pressure vTi-phase appears during HPT of the Ti-1 wt.% Fe alloy. However, the vTi does not appear after uniaxial compression at the same pressure, without torsion. vTi remains quenched after pressure release and disappears by heating around 140-150°C. However, the further alloying with iron suppresses the formation of vTi-phase. As a result, vTi does not appear after HPT in the Ti-10 wt.% Fe alloy.

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

Phase transitions in metallic alloys driven by the high pressure torsion

Cited by 113 publications

References 70 publications

Effect of Severe Cold or Warm Deformation on Microstructure Evolution and Tensile Behavior of a 316L Stainless Steel

Effect of Severe Cold or Warm Deformation on Microstructure Evolution and Tensile Behavior of a 316L Stainless Steel

Phase Transformations in Ti–Fe Alloys Induced by High‐Pressure Torsion

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

Contact Info

Product

Resources

About