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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 10/2019

23.09.2019

Hot Deformation and Processing Maps of B4C/6061Al Nanocomposites Fabricated by Spark Plasma Sintering

verfasst von: Ruifeng Liu, Wenxian Wang, Hongsheng Chen, Yuyang Zhang, Shipeng Wan

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 10/2019

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Abstract

We developed 3 vol.% B4C/6061Al nanocomposites by spark plasma sintering. We then characterized their flow and hot deformation behaviors using isothermal compression tests at deformation temperatures of 673-823 K and strain rates of 0.001-1 s−1. Results indicated that their steady flow characteristic can be described by the Zener–Hollomon parameter (Z) as a hyperbolic-sine function of flow stress. Based on pinning effect from B4C nanoparticles, the estimated activation energy was calculated to be 274.80 kJ/mol. At the unstable deformation condition (723 K/1 s−1) with high Z, flow localization appeared; the main softening mechanisms involved are dynamic recovery and dynamic recrystallization (DRX). At the stable deformation condition (823 K/0.001 s−1) with low Z, adequate DRX occurred. Based on the processing map and microstructure evolution, the optimum hot working conditions for B4C/6061Al nanocomposites were determined to be a deformation temperature of 773-823 K and a strain rate of 0.001-0.003 s−1. These working conditions were verified by a hot extrusion test.
Vorheriger Artikel Comparative Corrosion Behavior of Five Different Microstructures of Rebar Steels in Simulated Concrete Pore Solution with and Without Chloride Addition
Nächster Artikel Exploiting Acoustic Anisotropy to Detect Recrystallization in a Ni Single Crystal Using Ultrasonic Nondestructive Inspection

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Metadaten
Titel
Hot Deformation and Processing Maps of B4C/6061Al Nanocomposites Fabricated by Spark Plasma Sintering
verfasst von
Ruifeng Liu
Wenxian Wang
Hongsheng Chen
Yuyang Zhang
Shipeng Wan
Publikationsdatum
23.09.2019
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 10/2019
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-019-04336-0

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