Crystallization and high-temperature deformation behavior of Cu49Zr45Al6 bulk metallic glass within supercooled liquid region

Lee, Kwang Seok; Jo, Yu Mi; Lee, Young-Seon

doi:10.1016/j.jnoncrysol.2013.05.036

Cited by 25 publications

(4 citation statements)

References 41 publications

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“…Those make for a superiority for potential functional materials 4–6 . However, the BMGs present little or no plastic deformation on the condition of room temperature, which results in the disastrous failure in virtue of one dominant shear band 7–10 . According to literature review, the BMGs would exhibit superplastic deformation in the supercooled liquid region.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6] However, the BMGs present little or no plastic deformation on the condition of room temperature, which results in the disastrous failure in virtue of one dominant shear band. [7][8][9][10] According to literature review, the BMGs would exhibit superplastic deformation in the supercooled liquid region. Therefore, it could be used for processing the BMGs to overcome the drawbacks of the poor plasticity of the BMGs on the condition of room temperature.…”

Section: Introductionmentioning

confidence: 99%

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Crystallization kinetics of Cu–Zr–Al bulk metallic glass with Nd addition

Yang

et al. 2021

Int J of Chemical Kinetics

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The crystallization kinetics of (Cu48Zr48Al4)100−xNdx (x = 0, 2 at.%) bulk metallic glasses in nonisothermal and isothermal conditions were studied by differential scanning calorimetry and X‐ray diffraction (XRD). XRD analysis shows that the crystallization product Cu10Zr7 changes to Cu10Zr7 and Cu2Nd with Nd presence in nonisothermal and isothermal conditions. Crystallization activation energy was calculated in nonisothermal conditions using Kissinger and Ozawa methods and in isothermal conditions using Arrhenius model. The results show that the activation energy harbored by (Cu48Zr48Al4)98Nd2 expresses larger value compared with Cu48Zr48Al4, which indicate that the energy barrier for crystallization has enhanced along the Nd addition. The Johnson–Mehl–Avrami model was employed for analyzing the crystallization kinetics in isothermal condition. The Avrami exponent n for Cu48Zr48Al4 is more than 2.5, demonstrating that the crystallization is mainly governed by diffusion‐controlled three‐dimensional growth with increasing nucleation rate. Comparably, the Avrami exponent n for (Cu48Zr48Al4)98Nd2 is 1.5 < n < 2.5, suggesting that the crystallization is mainly determined by diffusion‐controlled three‐dimensional growth with decreasing nucleation rate. The evident enhancement in crystallization activation energy based on Nd addition is rationally made up of an influential factor commonly harbored on the enhanced glass forming ability for the rare‐earth comprising Cu–Zr–Al metallic glasses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crystallization kinetics of Cu–Zr–Al bulk metallic glass with Nd addition

Yang

et al. 2021

Int J of Chemical Kinetics

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“…The metallic glass composites were formed mainly due to partial crystallization of fully glassy matrix via annealing [8][9][10] and mechanical deformation experiment [11]. Moreover, the proper annealing treatment can cause the more homogenous precipitation of the nanocrystals than the mechanical deformation [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing on the microstructure, microhardness, and corrosion resistance of Ni 62 Nb 33 Zr 5 metallic glass and its composites

Zhang

Gao

Dong

et al. 2015

Journal of Non-Crystalline Solids

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“…Aluminum has been regarded as useful element to improve the plasticity of the CuZr-based BMGs [4]. The addition of minor Al quantities (up to 10 at%) to the Cu-Zr glassy alloys may improve their thermal stability, mechanical properties and glass forming ability (GFA) [5,6]. Glassy alloys can be produced by casting and by solid state techniques such as mechanical alloying (MA) [7][8][9][10]12] or mechanical milling (MM) [8,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution in CuZrAl alloys during ball-milling

Tomolya

Janovszky

Benke

et al. 2013

Journal of Non-Crystalline Solids

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Abstract:The microstructure evolution during mechanical milling was studied in the CuZrAl system. The compositions lay on the two liquidus surfaces indicating different solidification processes in the three alloys. Cu(55-x)Zr(35+x)Al10 (x = 0; 5; 10 at%) master alloys were produced by arc melting. After identification of the phases, the master alloys were milled for 25 hours and amorphous/crystalline powders were synthesized. The master alloys contained Al21Cu28Zr51, AlCu2Zr, CuZr and traces of Cu10Zr7 phases in different volume fractions. The optimal milling time was determined to be 15 hours based on the results of X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) examinations. The 5 h milled powder contained CuZr and Al21Cu28Zr51 phases, which diminished due to further milling resulting in amorphous matrix composite with nanosized Al21Cu28Zr51 phase. The thermal stability of the samples was investigated by DSC. The peak temperatures of the first crystallization process of the as-milled powders shifted as function of milling time and polynomial curves were fitted to the measured points.

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Crystallization and high-temperature deformation behavior of Cu49Zr45Al6 bulk metallic glass within supercooled liquid region

Cited by 25 publications

References 41 publications

Crystallization kinetics of Cu–Zr–Al bulk metallic glass with Nd addition

Crystallization kinetics of Cu–Zr–Al bulk metallic glass with Nd addition

Effect of annealing on the microstructure, microhardness, and corrosion resistance of Ni 62 Nb 33 Zr 5 metallic glass and its composites

Microstructure evolution in CuZrAl alloys during ball-milling

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