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ZrAlCuNiNb alloys and properties of glass forming ability

Compressive strength after annealing was almost unchanged, but the plasticity E. Decreased significantly. When the 743K and 773K bc strength after isothermal annealing significantly reduced. Compressive strength with temperature can be seen in Figure 4 the XRD spectrum: after heat treatment at 653K and 703K, the performance of the sample is still amorphous,[link widoczny dla zalogowanych], and its compression strength should be the same intensity when amorphous; in 743K and 773K After heat treatment, amorphous alloy phase separation has occurred or a new phase of precipitation, this should be a sharp decline in the compression strength of the root causes. . ● Zr2HZrzCu Yan kettle !!!!. VIII. . : Zhu / one thousand one hundred and eleven Zhu!. . . ~ 2040608020 /(,[link widoczny dla zalogowanych]。)( a) Zr57A1l0Cul54Nil26Nb5 block (b) compression stress-XRD spectra of amorphous alloys should change curve 47AlloCul54Ni12.6N1] 5 bulk amorphous alloy at different temperatures, the XRD spectrum after 20min treatment and compression stress-strain curves 3 Conclusions (1) Add an appropriate amount of Nb element can improve the Zr57A】 15. cu154Ni12.6Nb alloy glass forming ability, when the mole fraction of Nb is 5%, the alloy has the highest glass forming ability. (2) in a particular alloy composition, by using different diameter of the copper mold casting process, can study the different cooling rate on the amorphous formation ability. (3) Zr57A11oCu154Ni126Nb5 bulk amorphous alloys fracture strength of 1705MPa, the relative compression ratio of about 0.104%. (4) Zr57All0Cu15.4Ni12.6Nb5 bulk amorphous alloys by heat treatment phase separation or crystallization occurs precipitates after the sharp decline in compressive strength of the alloy. References lInoueA. TakeuchiA. RecentProgressinBulkGlassyAlloys. Mater. Trans. , 2002,43 (8): l892 ~ l9O62JiangQ. chiBQ. LiJC. alenceElectronConcentrationCriterionofMeta1.1icLiquids. App1. P} lys. Lett. . 20o3: 2984 ~ 29863ZP. LiuCT. ANewGlass. formingAbilityCriterionforBulkMetallicG1asseS. AetaMater. , 20o2,[link widoczny dla zalogowanych], 50 (13): 3501 ~ 35124ChenW. WangY. QiangJeta1. BulkMetallieG1assesintheZr-A1. Ni. cuSys. tem. ActaMater. . 20o3, 5l (7): l899 ~ l9o75SbindoT, WasedaY,[link widoczny dla zalogowanych], InoueA. PredictionofCriticalCong ~ ositionsforBulkG1assFormationinLa. based. Cu. basedandZr. basedTemalwA1lovs. MaterTrans. , 20o3 ,4-4 (3): 35l ~ 3576Ch0j-YimH, ConnerRD,[link widoczny dla zalogowanych], SzuecsFeta1. Processing, MicmstructureandProp. ertiesofDuctileMetalParticulateReinforcedZr57Nb5A1l0Cul54Nil26BulkMetallicG1assComposites. AetaMater. , 2002,50 (10): 2737 ~ 27457JohnsonWL. BIIlkAmorphousMetal-anEmergingEngineeringMateria1. JOM, 2002,54 (3) :40-438GottschallRJ. RecentAdvancesandFutureResearchDirectionsinBulkMeta/lieG1asses. Mater. Trans. . 200I, 42 (4): 548 ~ 550 (Editors: Wei Liu)

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