TY - JOUR
T1 - Sensitivity of 2198 Al-Li alloy to aging temperature and its precipitation behavior
AU - Zhang, Saifei
AU - Zeng, Weidong
AU - Yang, Wenhua
AU - Shi, Chunling
AU - Wang, Haojun
N1 - Publisher Copyright:
©, 2015, Rare Metals Materials and Engineering Press. All right reserved.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - The effect of aging temperature on the microstructure and tensile properties of 2198 Al-Li alloy were investigated by tensile test and TEM. The results show a great dependence of tensile properties on aging temperature in a narrow temperature region before peak aging. When the temperature (150℃~170℃/14 h) increases, the tensile strength rises dramatically; meanwhile the tensile elongation decreases. The main precipitates detected in 2198 alloy are δ', θ', β'/δ', T1 and σ phase. The combination and morphology of precipitates vary with different aging temperatures; the main precipitates are δ', θ', β'/δ' when aging below 160℃, while above 160℃, T1 and σ phases come out in large numbers, and become the dominating strengthening phases gradually. It is concluded that the sensitivity of 2198 Al-Li alloy to aging temperature is essentially attributed to the variety and amount of precipitates.
AB - The effect of aging temperature on the microstructure and tensile properties of 2198 Al-Li alloy were investigated by tensile test and TEM. The results show a great dependence of tensile properties on aging temperature in a narrow temperature region before peak aging. When the temperature (150℃~170℃/14 h) increases, the tensile strength rises dramatically; meanwhile the tensile elongation decreases. The main precipitates detected in 2198 alloy are δ', θ', β'/δ', T1 and σ phase. The combination and morphology of precipitates vary with different aging temperatures; the main precipitates are δ', θ', β'/δ' when aging below 160℃, while above 160℃, T1 and σ phases come out in large numbers, and become the dominating strengthening phases gradually. It is concluded that the sensitivity of 2198 Al-Li alloy to aging temperature is essentially attributed to the variety and amount of precipitates.
KW - 2198 alloy
KW - Aging
KW - Aluminum lithium alloy
KW - Mechanical properties
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=84944067168&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:84944067168
SN - 1002-185X
VL - 44
SP - 2024
EP - 2028
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 8
ER -