• Bulk Shape Memory NiTi with Refined Grain Size Synthesized ...

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    However, they quickly absorb hydrogen after mechanical deformation such as ball milling for a short time or one passes of cold rolling. Ball milling produced fast kinetics but with a loss of capacity while cold rolling gave faster kinetics than the as-cast state and with minimal loss of capacity.

  • Structural transformations in crystalline and amorphous ...

    Cold-rolling induced amorphization reactions in metallic multilayers are discussed in terms of the relevant process and control parameters. The parame…

  • Mechanical Properties of Nanocrystalline Materials ...

    During repeated plastic deformation as in ball milling or cold rolling, a concomitant refinement of grain size is observed. Recently, a new variation of the strategy has been developed which can yield nanocrystalline product structures [1-3]. By starting with a stacked sandwich array of elemental

  • Nanostructure Synthesis and Amorphization during Cold Rolling

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  • (PDF) Microstructural evolution and grain subdivision ...

    Mar 15, 2001· Solid state reactions in nanometer scaled diffusion couples prepared using high energy ball milling. ... and the diffusivity is enhanced through plastic deformation, fracture and cold welding. There might be a point after which the diffusion couple becomes so much activated that solid state reactions occur each time when it is heated through ...

  • High-Energy Ball Milling - an overview | ScienceDirect Topics

    A.S. Edelstein, in Encyclopedia of Materials: Science and Technology, 2001. 1.4 Mechanical Synthesis Methods. High-energy ball milling, also called mechanical attrition, can be used to reduce the grain size of materials from many micrometers to 2–20nm (see Mechanical Alloying).This is a result of the cold-working process creating large-angle grain boundaries.

  • Hydrogen storage performance of TiFe after processing by ...

    Microstructural evolution and grain subdivision mechanisms during severe plastic deformation of aluminum particles by ball milling Article (PDF Available) in Philosophical Magazine 95(13):1-23 ...

  • Solid state reactions in nanometer scaled diffusion ...

    The microstructure development during plastic deformation was reviewed for iron and steel which were subjected to cold rolling or mechanical milling (MM) treatment, and the change in strengthening ...

  • During Repeated Plastic Deformation As In Ball Milling Or ...

    Synthesis of bulk nanostructured materials by repeated cold-rolling Article in Materials Science and Engineering A 410-411:328-331 · November 2005 with 14 Reads How we measure 'reads'

  • Synthesis of bulk nanostructured materials by repeated ...

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  • Severe plastic deformation - Wikipedia

    This paper reviews a method, “in situ consolidation ball milling” that provides artifactfree bulk nanocrystalline samples for several ductile metals such as Zn, Al and Al alloys, and Cu and Cu alloys. The preparation method is described in this paper and examples of the mechanical behavior of nanocrystalline materials made by this technique are given.

  • Amorphization of Nanolaminates during Severe Plastic ...

    Evolution of morphology and texture during high energy ball milling of Ni and Ni-5 wt%Cu powders. ... which results in more plastic deformation and work hardening of the material, ... the energy transferred during ball milling is estimated for pure Ni for different BPR ratios used in the experiment (refer to supplement Section 3 for milling ...

  • Evolution of morphology and texture during high energy ...

    Hydrogen storage performance of TiFe after processing by ball milling ... Activation of TiFe for hydrogen storage by severe plastic deformation (SPD) through ball milling technique and the effect ...

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  • Effect of cold rolling and ball milling on first ...

    Repeated cold rolling with intermediate folding (RCR) represents a technique to obtain severe plastic deformation that avoids excessive heating at the internal interfaces and that proceeds without the simultaneous action of a high pressure in the range of several GPa. Aside from the opportunity to obtain amorphous bulk samples, the processing pathway also allows for synthesizing dense, bulk ...

  • Synthesis of Bulk Nanocrystalline Materials and Bulk ...

    It has been observed that during repeated plastic deformation as in ball milling or cold rolling, there is a concomitant refinement of grain size. Recently, a new variation of the strategy has been developed which can yield nanocrystalline product structures [I-31. By starting with a

  • Influence of Grain Refinement on Superelasticity in NiTi, #93.

    Nanocrystallization of Steels by Severe Plastic Deformation Minoru Umemoto Department of Production Systems Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan The formation of nanocrystalline structure (NS) in steels by various severe plastic deformation processes, such as ball milling, a ball drop

  • Nanocrystallization of Steels by Severe Plastic Deformation

    Mechanical alloying/milling (MA/MM) performed in a high-energy ball mill such as a shaker mill or planetary mill will also induce severe plastic deformation in metals. During milling, particles are fractured and cold welded together, resulting in large deformations.

  • Microstructure development of steel during severe plastic ...

    Amorphization of Nanolaminates during Severe Plastic Deformation: Molecular Simulations in the Cu-Zr System ... been formed through ball-milling in a wide variety of alloy systems [1-5]. An alternative means ... intended to reasonably represent the process of cold-rolling and doubling-over of elemental