Next Article in Journal
Radial Basis Functional Model of Multi-Point Dieless Forming Process for Springback Reduction and Compensation
Next Article in Special Issue
Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability
Previous Article in Journal
Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater
Previous Article in Special Issue
Effects of Porosity, Heat Input and Post-Weld Heat Treatment on the Microstructure and Mechanical Properties of TIG Welded Joints of AA6082-T6
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Metals 2017, 7(12), 530; https://doi.org/10.3390/met7120530

Microstructure of Multi-Pass Friction-Stir-Processed Al-Zn-Mg-Cu Alloys Reinforced by Nano-Sized TiB2 Particles and the Effect of T6 Heat Treatment

1
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
2
Unité Matériaux et Transformations, CNRS UMR 8207, Université Lille 1, Villeneuve d’Ascq 59655, France
3
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
Authors to whom correspondence should be addressed.
Received: 23 October 2017 / Revised: 8 November 2017 / Accepted: 14 November 2017 / Published: 27 November 2017
(This article belongs to the Special Issue Heat Treatment of Aluminum Alloys)
Full-Text   |   PDF [9250 KB, uploaded 27 November 2017]   |  

Abstract

In this work, a fine-grained structure with a uniform distribution of TiB2 particles and precipitates was achieved in TiB2 particle-reinforced (PR) Al-Zn-Mg-Cu alloys by friction stir processing (FSP). The effects of multi-pass FSP on the microstructure, and TiB2 particle distribution, as well as the microstructural evolution in the following T6 treatment, were investigated by X-ray diffraction, scanning electron microscopy and associated electron backscattered diffraction. The results showed that the distribution of TiB2 particles and alloy precipitates was further improved with an increase in the FSP passes. Moreover, compared with alloy segregation in the as-cast PR alloys during T6 treatment, a complete solution of the precipitates was achieved in the FSP-treated PR alloys. The fine-grained structure of the FSP-treated PR alloys was thermally stable without any abnormal growth at the high temperature of T6 treatment due to the pinning effect of dispersed TiB2 particles. The strength and ductility of the PR alloys were simultaneously improved by the combination of FSP and T6 treatment. View Full-Text
Keywords: friction stir processing; PR-aluminum alloy; nano-sized TiB2 particles; thermal stability; T6 treatment friction stir processing; PR-aluminum alloy; nano-sized TiB2 particles; thermal stability; T6 treatment
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Ju, X.; Zhang, F.; Chen, Z.; Ji, G.; Wang, M.; Wu, Y.; Zhong, S.; Wang, H. Microstructure of Multi-Pass Friction-Stir-Processed Al-Zn-Mg-Cu Alloys Reinforced by Nano-Sized TiB2 Particles and the Effect of T6 Heat Treatment. Metals 2017, 7, 530.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top