منابع مشابه
Precipitation evolution in Al–Zr and Al–Zr–Ti alloys during aging at 450–600 C
The transformation of Al3Zr (L12) and Al3(Zr1 xTix) (L12) precipitates to their respective equilibrium D023 structures is investigated in conventionally solidified Al–0.1Zr and Al–0.1Zr–0.1Ti (at.%) alloys aged isothermally at 500 C or aged isochronally in the range 300– 600 C. Titanium additions delay neither coarsening of the metastable L12 precipitates nor their transformation to the D023 st...
متن کاملImproving aging and creep resistance in a dilute Al–Sc alloy by microalloying with Si, Zr and Er
Nanosized precipitates in an Al–0.06Sc at.% alloy containing various microalloying additions were studied, with the goal of developing cost-effective aluminum alloys for high-temperature applications, using micro-hardness, electrical conductivity and atom-probe tomography measurements. Substituting 0.005 at.% Er for the more expensive Sc maintains high ambient-temperature strength, and dramatic...
متن کاملPrecipitation evolution in Al–Zr and Al–Zr–Ti alloys during isothermal aging at 375–425 C
Formation of Al3Zr or Al3(Zr1 x Tix) precipitates with a metastable L12 structure was investigated in conventionally solidified A1–0.1 Zr, Al–0.2 Zr, Al–0.1 Zr–0.1 Ti, and Al–0.2 Zr–0.2 Ti (at.%) alloys aged isothermally at 375, 400, or 425 C. Pronounced hardening results from nanometer-scale, spheroidal Al3Zr or Al3(Zr1 xTix) (L12) precipitates within solute-enriched dendrites. Interdendritic ...
متن کاملFRACTIONAL RECRYSTALLIZATION KINETICS IN DIRECTLY COLD ROLLED Al-Mg, Al-Mg-Sc AND Al-Mg-Sc-Zr ALLOY
The evaluation of texture as a function of recrystallization has been characterized for directly cold rolled Al-6Mg, Al-6Mg-0.4Sc and Al-6Mg-0.4Sc-0.2Zr alloys. Samples were annealed isothermally at 400 °C for 1 to 240 minutes to allow recrystallization. Recrystallization kinetics of the alloys is analyzed from the micro-hardness variation. Isothermally annealed samples of aluminum alloys were ...
متن کاملAging behavior in Cu–Al–Be shape memory alloy
This article reports positron annihilation spectroscopy and calorimetric measurements of the aging behavior in a Cu–Al–Be shape memory alloy. An excess of single vacancies is retained in the alloy as a result of a quench. All vacancies in excess disappear after long aging time, and a migration energy EM51.060.1 eV for this process has been found to be larger than in other Cu-based shape memory ...
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ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals and Materials
سال: 1973
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet1952.37.10_1134