TY - JOUR
T1 - Characteristics of 7055Al alloy powders manufactured by gas-solid two-phase atomization
T2 - A comparison with gas atomization process
AU - Si, Chaorun
AU - Tang, Xingling
AU - Zhang, Xianjie
AU - Wang, Junbiao
AU - Wu, Weichao
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/3/15
Y1 - 2017/3/15
N2 - In this paper, the principle of gas-solid two-phase atomization methodology for metal powder is demonstrated. A cost-effective production technology for high-quality metal powder was proposed. The morphology, size distribution, microstructure and cooling rate of two-phase atomized 7055Al powder were examined. The experimental results have demonstrated a number of advantages and unique features of gas-solid two-phase atomization in the preparation of metal powders. When the Argon gas pressure P = 0.6 MPa and iron particle feed rate M′ = 235.6 g·min− 1, the mass median diameter (d50) of the 7055Al powder manufactured by two-phase atomization process was 22.8 μm, which is reduced by 52.7% compared with gas atomized powders with d50 = 48.2 μm under the same atomization parameters. Experimental results also showed that the gas-solid two-phase atomized powders exhibited more irregular shapes than gas atomized powders. The cooling rate of most powders was in the range of 104– 105 K/s, and for some extra checked fine powders the cooling rate can even reach 106 K/s. The two-phase atomized powders had larger cooling rate and presented obvious rapid solidification characteristics than gas atomized powder with the same diameter. Moreover, this study indicates that gas-solid two-phase atomization could be a promising high-quality and low-cost metal powder preparation technology.
AB - In this paper, the principle of gas-solid two-phase atomization methodology for metal powder is demonstrated. A cost-effective production technology for high-quality metal powder was proposed. The morphology, size distribution, microstructure and cooling rate of two-phase atomized 7055Al powder were examined. The experimental results have demonstrated a number of advantages and unique features of gas-solid two-phase atomization in the preparation of metal powders. When the Argon gas pressure P = 0.6 MPa and iron particle feed rate M′ = 235.6 g·min− 1, the mass median diameter (d50) of the 7055Al powder manufactured by two-phase atomization process was 22.8 μm, which is reduced by 52.7% compared with gas atomized powders with d50 = 48.2 μm under the same atomization parameters. Experimental results also showed that the gas-solid two-phase atomized powders exhibited more irregular shapes than gas atomized powders. The cooling rate of most powders was in the range of 104– 105 K/s, and for some extra checked fine powders the cooling rate can even reach 106 K/s. The two-phase atomized powders had larger cooling rate and presented obvious rapid solidification characteristics than gas atomized powder with the same diameter. Moreover, this study indicates that gas-solid two-phase atomization could be a promising high-quality and low-cost metal powder preparation technology.
KW - 7055Al alloy
KW - Cooling rate
KW - Powder size
KW - Two-phase atomization
UR - http://www.scopus.com/inward/record.url?scp=85009344067&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2017.01.028
DO - 10.1016/j.matdes.2017.01.028
M3 - Article
AN - SCOPUS:85009344067
SN - 0264-1275
VL - 118
SP - 66
EP - 74
JO - Materials and Design
JF - Materials and Design
ER -