Microstructure and properties of cold consolidated amorphous ribbons from (NiCu)ZrTiAlSi alloys

Czeppe, T.; Korznikova, G. F.; Morgiel, J.; Корзников, А. В.; Chinh, Nguyen Q.; Ochin, P.; Sypień, Anna

doi:10.1016/j.jallcom.2008.07.165

Cited by 15 publications

(12 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[3] In the HPT process, first introduced by Bridgman in 1935, [4] a small thin disc is placed between two massive anvils under a high hydrostatic pressure and intense shear strain is introduced by rotating the two anvils with respect to each other. The HPT as a processing tool for consolidation of powders was first used in 1991 [2] and further developed for the consolidation of metallic powders, [5][6][7][8] composites, [9][10][11][12][13][14][15][16][17][18][19][20][21][22] amorphous compounds, [22][23][24][25][26][27][28] machining chips, [28][29][30] and very recently for ceramic powders. [31] The HPT process was also applied successfully as a cold consolidation technique without sintering process for ball-milled powders including pure Ni, [5] pure Co, [7] an Al-Mg alloy, [8] Co-based metal-ceramic composites, [17,18] and amorphous powders and chips.…”

Section: Introductionmentioning

confidence: 99%

Cold Consolidation of Ball-Milled Titanium Powders Using High-Pressure Torsion

Edalati

Horita

Fujiwara

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

KAVEH EDALATI, ZENJI HORITA, HIROSHI FUJIWARA, and KEI AMEYAMA Pure Ti (99.5 pct) powders after processing with ball milling (BM) were consolidated to disc-shaped samples with 10-mm diameter and 0.8-mm thickness at room temperature using high-pressure torsion (HPT). A relative density as high as 99.9 pct, high bending and tensile strengths of 2.55 to 3.45 and 1.35 GPa, respectively, and a moderate ductility of 8 pct with an ultrafine grained structure are achieved after cold consolidation with HPT, which exceed those of hot consolidation methods. X-ray diffraction (XRD) analysis showed that a phase transformation occurs from a phase to x phase during HPT under a pressure of 6 GPa as in bulk pure Ti, whereas no phase transformation is detected after processing with BM alone. It was confirmed that the strength and ductility are improved by a combined application of BM and HPT when compared with other severe plastic deformation methods applied to Ti and Ti-6 pct Al-4 pct V, so that no alloying elements are required for the achievement of a comparable strength and ductility.This study used high-purity Ti (99.5 pct) powders with a particle size less than 45 lm having impurities of O 0.35, C 0.02, N 0.03, H 0.02, Fe 0.03, Mn 0.005, Mg 0.02, Cl 0.04, and Si 0.01 (wt pct). The Ti powders were KAVEH EDALATI, Graduate Student, and ZENJI HORITA, Professor, are with the

show abstract

Section: Introductionmentioning

confidence: 99%

Cold Consolidation of Ball-Milled Titanium Powders Using High-Pressure Torsion

Edalati

Horita

Fujiwara

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…Amorphous ribbons of compositions (Ni 56 Cu 2 )Zr 18 Ti 13 Al 6 Si 5 and (Ni 36 Cu 23 ) Zr 18 Ti 14 Al 5 S i4 were consolidated by HPT at room temperature applying 6 GPa pressure and two turns [43]. Unlike many other examples described earlier, these alloys have not indicated any crystallization-preserving amorphous structure [44].…”

Section: Figure 518 (A) Appearance Of Alumina Powders Before (Left) mentioning

confidence: 74%

New Approaches to HPT Processing

Valiev¹,

Zhilyaev²,

Langdon³

2013

Bulk Nanostructured Materials

View full text Add to dashboard Cite

“…Yet another direction aimed at plasticization of amorphous materials is formation of a gradient structure with a smooth transition from an amorphous structure to a crystalline one, as a result of severe deformation, for instance, by ball milling [8]. We demonstrated earlier that severe deformation in Bridgman's anvils could be used for consolidation of amorphous Ni-based ribbons and fabrication of monolithic amorphous samples [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%