Abstract
Effect of non-isothermal aging treatment on microstructure and properties of 7A60 aluminum alloys was in present work. Hardness is decided by the start cooling temperature and cooling rate, high initial cooling temperature and fast cooling rate will improve the hardness of the alloy. The electrical conductivity of the alloy is mainly determined by the initial temperature, the higher the initial temperature, the higher the conductivity. Hardness and electronic conductivity were improved greatly during initial cooling stage. Afterward, hardness and conductivity was slightly affected. Transmission electron microscopy (TEM) and high-resolution transmission electron microscope (HRTEM) analysis showed that the main strengthen precipitate of the 7A60 alloy by cooling aging is plate-like η′ phase, which precipitating along the {111}Al. There are great different in the size of η′ phase, which dispersed in Al grains, and the PFZ is narrow by high temperature rapid cooling aging.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
A. Deschamps and Y. Bréchet, “Influence of quench and heating rates on the ageing response of an Al-Zn-Mg-(Zr) alloy,” Materials Science and Engineering A, 251(1998), 200–207.
Ø. Grong and H. R. Shercliff “Microstructural modelling in metals processing,” Progress in Materials Science, 47(2002), 163–182.
C. Nowill, “Investigation of the Quench and Heating Rate Sensitivities of Selected 7000 Series Aluminum Alloys” (Master. thesis, Worcester Polytechnic Institute, 2007), 20–23.
A. Deschamps and M. Nicolas, “Characterisation and modelling of precipitate evolution in an Al-Zn-Mg alloy during non-isothermal heat treatments,” Acta Materialia, 51(20) (2003), 6077–6094.
M. NICOLAS, “Precipitation evolution in an Al-Zn-Mg alloy during non-isothermal heat treatments and in the heat-affected zone of welded joints,” (Ph.D. thesis, Institut National Polytechnique de Grenoble, 2002), 13–15.
C. H. Gur And I. Yildiz. “Non-destructive investigation on the effect of precipitation hardening on impact toughness of 7020 Al-Zn-Mg alloy,” Materials Science and Engineering A, 382(2004), 395–400
D. E. Alaron and A. M. M. Nazav. “The effect of microstructure on the mechanical. behavior and fracture mechanism in a 7050-T76 aluminium alloy,” Materials Science and Engineering A, A138 (1991), 275–285
F. Viana et al., “Retrogression and re-aging of 7075 aluminium alloy: microstructural characterization,” Journal of Materials Process Technology, 92–93 (1999), 54–59
A. K. Mukhopadhyay et al., “Microtructure property relationships in a high strength Al-Zn-Mg-Cu-Zr alloy,” Materials Forum, 28(2004), 883–888
J. T. Staley, “Method and Process of Non-isothermal for Aluminum Alloys,” US Patent.0237113Al (2007).
Q. J. Tang, “Study on Cooling Aging Process of 7A85 Aluminum Alloys” (Master. thesis, Harbin Institute of Technology, 2010), 56–63
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 TMS (The Minerals, Metals & Materials Society)
About this paper
Cite this paper
Yan, L., Daming, J., Gaohui, W. (2012). Ageing Hardning and Precipitationg of the 7A60 Alloy during Cooling Aging. In: Weiland, H., Rollett, A.D., Cassada, W.A. (eds) ICAA13 Pittsburgh. Springer, Cham. https://doi.org/10.1007/978-3-319-48761-8_176
Download citation
DOI: https://doi.org/10.1007/978-3-319-48761-8_176
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48225-5
Online ISBN: 978-3-319-48761-8
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)