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Untersuchung des mehrstufigen Homogenisierungsprozesses der Aluminiumlegierung 2618
Author(s) -
Zhu Z.,
Peng H.,
Liu Y.,
Tu H.,
Wang J.,
Su X.
Publication year - 2020
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201900117
Subject(s) - homogenization (climate) , alloy , melting point , materials science , aluminium , dissolution , metallurgy , analytical chemistry (journal) , composite material , chemistry , chromatography , biodiversity , ecology , biology
Single‐, two‐, and three‐stage homogenization treatments of heat‐resistant alloy 2618 were conducted in this study. Results reveal a low melting point Al 2 CuMg phase and high melting point Al 2 Cu phase in the as‐cast aluminum alloy 2618. After single‐stage homogenization at 495 °C for 10 h, the Al 2 CuMg phase dissolves completely, but the Al 2 Cu phase cannot be completely dissolved even once the homogenization time is prolonged to 18 h. After the alloy 2618 are homogenized using two stages: 495 °C for 10 h and 520 °C for 8 h, a portion of the Al 2 Cu phase remains in the alloy. The Al 2 Cu phase remains undissolved even after prolonged time. After the two‐stage homogenization treatment at 495 °C for 10 h and 540 °C for 5 h, the high melting point Al 2 Cu phase completely dissolves but overburn occurs. After the alloy 2618 are homogenized using three stages at 495 °C for 10 h, 520 °C for 5 h, and 540 °C for 3 h, the Al 2 Cu phase completely dissolves and no overburn is detected. The three‐stage homogenization treatment is an effective method for dissolving the high melting point Al 2 Cu phase in the alloy 2618 and increasing their overburn temperature and solid solution temperature.