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Ball milling and shape memory alloys

  • High-Energy Ball Milling Conditions in Formation of

    Sep 10, 2021 One of the manufacturing methods that leads to the amorphous/nanocrystalline SMA is high-energy ball milling combined with annealing. Using this technique, an SMA memory alloy, with the nominal chemical composition of Ni 25 Ti 50 Cu 25, was produced from commercial elemental powders (purity −99.7%). The structure and morphology were characterized (at the

  • Synthesis and characterization of shape memory Nano

    Abstract: Present work is based on synthesis of shape memory nano alloy by mechanical alloying using high energy ball mill (HEBM). Shape memory alloys are very useful in various applications, especially in actuators and smart systems, these materials recognize their shape due to pseudoelastic property, they exhibit

  • Synthesis and characterization of shape memory

    We have focused on synthesis of shape memory alloy by mechanical alloying using high energy ball mill. Ball to powder ratio, milling medium, and speed of ball mill are important parameters which influence effectiveness of milling process. By selecting proper ball to powder ratio, rotational speed, medium we can optimize the process

  • Effect of ball-milling conditions on microstructure during

    Aug 03, 2011 Fe–Mn–Si-based alloys have drawn much attention due to shape memory effect (SME) [1, 2, 3].Fe–Mn–Si-based alloys have long been extensively studied since pronounced SME was discovered in a Fe–30Mn–1Si single crystal in early 1980s [].These alloys exhibit many advantages such as high strength, good plasticity, and low price

  • Micromilling of NiTi Shape-Memory Alloys with Ball

    In the micromilling of shape memory alloys (SMA) using TiAlN-coated ball nose ... selection is better for the milling of NiTi shape memory alloy as used as

  • Fabrication of Ti-Ni-Cu shape memory alloy powders by ball

    Made available by U.S. Department of Energy Office of Scientific and Technical Information


    Powder Metallurgy method is used to produce Cu-Based Shape memory alloys with maximum desired properties. It is simpler to use P/M to produce near-net shape alloy products and give better controllability of the composition and grain sizes. In this study, ball milling process is applied to convert the elemental powder

  • NASA shape memory alloys - Aerospace Manufacturing and

    Dec 05, 2017 The NASA Glenn team has created process-finished SMA rods 1 in diameter up to 10ft long, starting with 8 , 150-lb ingots. One application is a torque tube that can be used for rotary motion. When heated, it twists to drive a wing flap. Shape memory alloys at the microscopic level, showing crystal micro-structure

  • Influence of Batch Mass on Formation of NiTi Shape Memory

    Oct 31, 2021 A high-energy ball milling technique was used for production of the equiatomic NiTi alloy. The grinding batch was prepared in two quantities of 10 and 20 g. The alloy was produced using various grinding times. Scanning electron microscopy, X-ray diffraction, hardness measurement and differential scanning calorimetry were used for materials characterization at

  • TiNi Shape Memory Alloy Foams Synthesized by Spacer

    Abstract: Titanium (Ti) andnickel (Ni) elemental powders were blended by ball milling and the ball milled powders were employed to fabricate TiNi shape memory alloy (SMA) foams by spacer sintering. Effect of ball milling time on phase constitutes of the sintered TiNi alloy foams was studied by X-ray diffraction (XRD) analysis

  • EG0800319 The Effect of Heat Treatment on the Thermo

    Sang-ho and Tae-hyun(1) fabricated the alloys using ball-milling method. They found that Ti-Ni powders with milling time 30h is the most optimum for the fabrication. The (Ti-50at% Ni) alloy powders were annealed at 850 oC/1h .The XRD patterns of the alloy powder heated at 850 oC/1h show peaks corresponding to B2 and martensite phase B19

  • Effect of aging and ball milling on the phase

    Zr8 alloys were mechanically crushed to a size of 3 mm and then ball milled for 0.5 h in a QM-3A vibration ball mill with hardened steel vial and balls in a ball-to-powder ratio of 10: 1. The acetone was added as the milling medium and the milling speed was 1400 rpm/min. Finally the as-milled powders were annealed at 800 C for 2 h in vacuum

  • Mechanical Behavior of Nanostructured Melt Spun

    the known shape memory alloys, NiTi is the most commonly used because of its excellent mechanical properties, corrosion resistance and biocompatibility. A variety of methods have been attempted in order to create finer-grained shape memory alloys. These include ultrarapid melt quenching, ball milling followed by powder metallurgy

  • Mechanically induced disorder and crystallization process

    Dec 25, 2016 This means that, by means of ball milling and adequate thermal treatments, functional Ni-Mn-In metamagnetic shape memory alloys interesting for practical applications of magnetic refrigeration at nanoscale (around 150 nm after annealing) are achieved. Download : Download high-res image (477KB) Download : Download full-size image; Fig. 11

  • TiNi shape memory alloy foams synthesized by spacer

    Titanium (Ti) and nickel (Ni) elemental powders were blened by ball milling and the ball milled powders were employed to fabricate NiNi shape memory alloy (SMA) foams by space sintering. Effect of ball milling time on phase constitutes of the sintered TiNi alloy foams was studied by X-ray diffraction (XRD) analysis.Scanning election microscopy (SEM) was used to characterize

  • Effect of thermal treatment and ball milling on

    Ni−Mn−Ga alloys after aging and ball milling, in this work, the microstructure and phase transformation of the aged and ball-milled Nb-doped Ni−Mn−Ga alloys were systematically investigated and discussed. 2 Experimental The (Ni49.8Mn28.5Ga21.7)100−xNbx (x=1, 3, 6, 9 at.%) polycrystalline ingots were fabricated by arc-melting

  • Metals | Free Full-Text | Influence of Structural Defects

    The production of μ-particles of Metamagnetic Shape Memory Alloys by crushing and subsequent ball milling process has been analyzed. The high energy involved in the milling process induces large internal stresses and high density of defects with a strong influence on the martensitic transformation; the interphase creation and its movement during the martensitic

  • Evaluation of mechanical alloying to obtain Cu-Al-Nb shape

    The technical viability of preparing a Cu-Al-Nb shape memory alloy by high energy ball milling in a planetary mill has been evaluated. The alloy Cu-13Al-2Nb (wt. (%)) was prepared by mixing pure elemental powders. A ball-to-powder weight ratio of 6:1 and rotation rate of 150 rpm in argon atmosphere were the main processing parameters

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