The mechanism of formation of nanostructure and dissolution of cementite in a pearlitic steel during high pressure torsion

Ivanisenko, Yulia; Łojkowski, Witold; Valiev, Ruslan Z.; Fecht, Hans Jörg

doi:10.1016/s1359-6454(03)00419-1

Cited by 418 publications

(181 citation statements)

References 29 publications

Supporting

Mentioning

150

Contrasting

Order By: Relevance

“…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

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

show abstract

“…Based on the aforementioned results, several aspects should be noted. First, conventional methods for fabricating nanostructured metallic materials need a hypercritical method or condition, i.e., surface mechanical attrition treatment [27], high pressure torsion [28], or severe plastic deformation [29]. Here, our observed nanoparticles remain comparatively easier to be acquired by medium temperature (350 C) and routine mechanical deformation.…”

mentioning

confidence: 95%

Order-Disorder Transition of Aragonite Nanoparticles in Nacre

Huang

2012

Phys. Rev. Lett.

View full text Add to dashboard Cite

“…Severe Plastic Deformation processes such as Accumulative Roll-Bonding (ARB), Equal Channel Angular Pressing (ECAP) and High Pressure Torsion (HPT) have been frequently used to obtain UFG microstructures. [1][2][3][4][5][6] However, alternatives techniques such as severe torsion test applying an ARB schedule 7) and warm caliber rolling 8) has been used with relatively successful for UFG production. The ARB and ECAP techniques introduce high heterogeneities concerning temperature, strain and strain rate distribution within the samples.…”

Section: Introductionmentioning

confidence: 99%

Influence of Carbon Content and Deformation Temperature on Ultra-Grain Refinement of Plain Carbon Steels by Means of Torsion Test

Calado

Barbosa

2013

ISIJ Int.

View full text Add to dashboard Cite

The effect of carbon content and deformation temperature on ultra-grain refinement of two plain carbon steels was studied. The steels samples were severely deformed by means of warm torsion tests. For both steels, the final microstructure consisted of ultrafine ferrite grains and small dispersed cementite particles depend on the test temperature. Increase in carbon content led to a decrease in the average ferrite grain size due to the presence of a higher volume fraction of cementite particles. Increasing in deformation temperature led to an increase in ferrite grain size. In addition, a critical strain for ultra grain refinement was reached for both steels. This critical deformation represents a minimum accumulated equivalent strain beyond which further significant grain size refinement is not more achievable. The higher the C content, the smaller this critical deformation was.

show abstract

The mechanism of formation of nanostructure and dissolution of cementite in a pearlitic steel during high pressure torsion

Cited by 418 publications

References 29 publications

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

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

Order-Disorder Transition of Aragonite Nanoparticles in Nacre

Influence of Carbon Content and Deformation Temperature on Ultra-Grain Refinement of Plain Carbon Steels by Means of Torsion Test

Contact Info

Product

Resources

About