Imperial College London
Portrait Picture

DrJunJiang

Faculty of Engineering, Department of Mechanical Engineering

Senior Lecturer
 
 
 
//

Contact

 

jun.jiang

 
 
//

Location

 

523City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Zheng:2019:10.1016/j.jallcom.2019.151934,
author = {Zheng, J-H and Dong, Y and Zheng, K and Dong, H and Lin, J and Jiang, J and Dean, TA},
doi = {10.1016/j.jallcom.2019.151934},
journal = {Journal of Alloys and Compounds},
title = {Experimental investigation of novel fast-ageing treatments for AA6082 in supersaturated solid solution state},
url = {http://dx.doi.org/10.1016/j.jallcom.2019.151934},
volume = {810},
year = {2019}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Developing a fast-ageing treatment can significantly reduce the current processing time (180°C×9h) of high strength AA6082 automotive components. In this study, a fast ageing treatment in supersaturated solid solution state was developed, such that the mechanical properties can be rapidly achieved after the paint bake (PB) treatment through introducing a pre-ageing (PA) treatment. The determined fast ageing method considered effects of temperature & time, heating rate and subsequent PB on the ageing response. Tensile tests and TEM observations of typical conditions were undertaken to examine evolved strength and precipitate distribution. Results showed that 210°C was the optimum pre-ageing temperature as uniformly sized and distributed small precipitates were obtained. The final strength of about 280MPa, that is 95% of the nominal strength for T6 temper, can be obtained within 15min soaking for fast heating, and nearly this value for slow heating. More prolific nucleation occurred during slow heating, resulting in more finely distributed precipitates and a higher strengthening. It was observed that PB further increased the strength of over-aged alloy pre-aged at a high temperature of 240°C. The subsequent PB enabled further nucleation of small clusters and growth of the pre-ageing-induced precipitates which were smaller than 20nm. This resulted in an improvement in the material strength potentially to satisfy the safety requirements in automotive industry.
AU  - Zheng,J-H
AU  - Dong,Y
AU  - Zheng,K
AU  - Dong,H
AU  - Lin,J
AU  - Jiang,J
AU  - Dean,TA
DO  - 10.1016/j.jallcom.2019.151934
PY  - 2019///
SN  - 0925-8388
TI  - Experimental investigation of novel fast-ageing treatments for AA6082 in supersaturated solid solution state
T2  - Journal of Alloys and Compounds
UR  - http://dx.doi.org/10.1016/j.jallcom.2019.151934
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000486596000093&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/76910
VL  - 810
ER  -
Download