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

页码：1503 / 1509

页数：7

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