Nanostructured Al86Gd6Ni6Co2 bulk alloy produced by twist extrusion of amorphous melt-spun ribbons

Shpak, A. P.; Varyukhin, V. N.; Tkatch, V.I.; Маслов, В. А.; Beygelzimer, Yan; Synkov, Sergey; Носенко, В. К.; Rassolov, S.G.

doi:10.1016/j.msea.2006.03.081

Cited by 28 publications

(21 citation statements)

References 14 publications

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“…In order to estimate of the influence of alloying on glass forming ability of Al-based melts as well as on thermal stability, structure, microhardness, mechanisms of nanocrystallization of amorphous phases a series of 12 binary, ternary, quaternary and quinary Al 90-86 (Ni,Co,Fe) [6][7][8] (Y,Gd,Tb) 6-10 alloys has been prepared by arc melting under highly purified argon atmosphere and rapidly quenched from liquid state by the melt-spinning processing under a helium atmosphere. Glass forming ability of the alloys has been qualitative estimated at this stage from the specific features of the X-ray diffraction patterns.…”

Section: Methods Assumptions and Proceduresmentioning

confidence: 99%

“…The effect of nanocrystallization on mechanical properties has been estimated from the microhardness measurements. Amorphous Al 90-86 (Ni,Co,Fe) [6][7][8] (Y,Gd,Tb) 6-10 alloys have been obtained by single roller melt spinning technique in the form of ribbons 5-10 mm wide and 35-90 μm thick as described in the previous annual report. The electrical resistance of ribbons has been measured in situ by the automated four-probe dc method in which thermal emf effects were accounted by averaging for positive and negative voltages.…”

Section: Methods Assumptions and Proceduresmentioning

confidence: 99%

“…1). Such determined values of T ons2 for the alloys investigated listed in Table 5 Another important parameter of alloys with nanocomposite structure from point of view their subsequent warm consolidation by pressing (e.g., [7]) is difference between the temperatures of the onset of the second and first crystallization stages (∆T = T ons2 -T ons1 ). This parameter determines the temperature range in which the consolidation process can be carried out without degradation of the enhanced mechanical properties.…”

Section: Activity 23 Determination Of the Parameters Of Nanocompositmentioning

confidence: 99%

“…However, until now, these properties were obtained in thin ribbons produced by the melt-spinning technique so the application of such nanophase composites as structural materials is restricted. To obtain bulk Al-based materials with nanocomposite structure, two basic strategies may be used -search the alloy compositions with high glass forming ability [5] and consolidation of melt-spun ribbons or powders with amorphous structure [6,7]. Since the key process which determines the nanocrystal size and their volume density as well the thermomechanical regimes of consolidation required to keep nanocomposite structure is nanocrystallization the studies of this project stage have been focused on establishment of the mechanisms this process.…”

Section: Introductionmentioning

confidence: 99%

“…Crystallization of a series of 12 binary, ternary, quaternary and quinary amorphous Al 90-86 (Ni,Co,Fe) [6][7][8] (Y,Gd,Tb) 6-10 alloys begins at temperatures 440-584 K by formation of the nanocomposite structures (nanocrystals embedded in the residual amorphous matrix) and occurs in 2 or 3 well-defined stages.…”

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confidence: 99%

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Development of High Strength Thermally Stable Al-based Alloys with Nanocomposite Structure

Maslov¹

2010

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)05-02-2010 REPORT TYPE Final Report DATES COVERED (From -To)01-Dec-06 -11-Jun-10 TITLE AND SUBTITLE PERFORMING ORGANIZATION REPORT NUMBERN/A SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)EOARD Unit 4515 BOX 14 APO AE 09421 SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S)STCU 06-8005 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTThis report results from a contract tasking Institute for Metal Physics, NAS of Ukraine as follows: The demands on materials set by aerospace and aircraft manufacturers include the development of alloys possessing high strength-to-weight ratios and capable to withstand high temperature exposures during service. One of the promising classes of materials which may meet these requirements are Al-based alloys with nanocomposite structures formed by partial crystallization of amorphous precursors the strength of which may exceed 1500 MPa. Solution of the problems concerning alloys chemistry and ability to tailor of certain microstructures is of prime importance for the development of new nanostructured materials. The goals of the project are to perform the systematic experimental studies of the effects of alloy composition and thermal prehistory on glassforming ability, thermal stability, crystallization behaviour and mechanical properties of a series binary, ternary and multicomponent Al-based alloys alloyed by transition metals and rare earths as well as to elaborate appropriate theoretical models of nanocrystallization processes. The main factors responsible for nanoscale microstructure formation will be determined from comparison of the experimental data with the model predictions.As a result a series of new Al-based alloys with nanocomposite structure with improved mechanical properties and enhanced thermal stability will be developed and the fundamental basis for the nanostructured alloys design will be created. SUBJECT TERMS

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Section: Methods Assumptions and Proceduresmentioning

confidence: 99%

Section: Methods Assumptions and Proceduresmentioning

confidence: 99%

Section: Activity 23 Determination Of the Parameters Of Nanocompositmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Development of High Strength Thermally Stable Al-based Alloys with Nanocomposite Structure

Maslov¹

2010

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Twist Extrusion as a Potent Tool for Obtaining Advanced Engineering Materials: A Review

et al. 2017

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Twist extrusion (TE) is one of the most popular techniques of severe plastic deformation, aiming at imparting to a material a tailored microstructure and the associated property improvement. The article provides a survey of the literature on the mechanics of TE and the effect it has on the structure, texture, and the attendant properties of various materials, including metals and alloys, powder materials, and polymers. Special emphasis is placed on vortex flow during TE and its hitherto unexplored potential for producing micro-and macrostructures that promise superior properties of the materials. In particular, the possibility of creating novel hybrid materials with chiral inner architecture is demonstrated. The survey is concluded by a presentation of examples of practical applications of TE.

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Analysing the Twist Extrusion of Porous Blanks Using Modified Theories of Plasticity for Porous Bodies

Kuz’mov

Shtern

Kirkova

et al. 2016

Powder Metall Met Ceram

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Nanostructured Al86Gd6Ni6Co2 bulk alloy produced by twist extrusion of amorphous melt-spun ribbons

Cited by 28 publications

References 14 publications

Development of High Strength Thermally Stable Al-based Alloys with Nanocomposite Structure

Development of High Strength Thermally Stable Al-based Alloys with Nanocomposite Structure

Twist Extrusion as a Potent Tool for Obtaining Advanced Engineering Materials: A Review

Analysing the Twist Extrusion of Porous Blanks Using Modified Theories of Plasticity for Porous Bodies

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