Age hardening behaviour of semi-solid squeeze cast A319 aluminium alloy

被引：1
|
作者：
Wang, Q. F. [1 ,2 ]
Wang, L. D. [3 ,4 ,5 ]
Zhu, D. Y. [1 ]
Lin, Z. [3 ]
Chen, X. [3 ]
Sheng, B. [2 ]
机构：
[1] Fuzhou Univ, Sch Mat Sci & Engn, 2 Xueyuan Rd, Fuzhou 350116, Fujian, Peoples R China
[2] Jimei Univ, Coll Mech & Energy Engn, 9 Shigu Rd, Xiamen 361021, Fujian, Peoples R China
[3] Fuzhou Univ, Sch Mech Engn & Auto, 2 Xueyuan Rd, Fuzhou 350116, Fujian, Peoples R China
[4] China Acad Machinery Sci & Technol, Inst Semisolid Met Technol, 22 Huancheng East Rd, Sanming 353300, Fujian, Peoples R China
[5] Fujian Kinrui Hitech Co Ltd, Econ Dev Area, Sanming 353399, Fujian, Peoples R China
来源：
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2018年 / 49卷 / 12期
关键词：
A319; alloy; age hardening; semi-solid; squeeze casting; gravity die casting; HEAT-TREATMENT; AL; SI; DUCTILITY; STRENGTH; PHASE;
D O I：
10.1002/mawe.201800037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of age hardening treatment on the hardness and microstructure of semi-solid squeeze cast A319 alloy is investigated. At 175 degrees C, the age-hardening curve of the alloy shows two peaks between which there was an apparent valley. Analyses by transmission electron microscopy, selected area electron diffraction and energy-dispersive X-ray detection suggest that the first peak is caused by formation of G.P.2 zones while the second peak can be related to formation of the metastable theta '- and Q '-phases. Compared with gravity die cast A319 the semi-solid squeeze cast A319 shows a larger increase and a higher peak in hardness during the age hardening process. Additionally, the latter requires another 32 h to reach the first hardness peak while it reaches the second hardness peak about 24 h earlier than the former.
引用
收藏
页码：1503 / 1509
页数：7
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