Hot Workability Analysis and Development of a Processing Map for Homogenized 6069 Al Alloy Cast Ingot

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Title:	Hot Workability Analysis and Development of a Processing Map for Homogenized 6069 Al Alloy Cast Ingot
Authors:	李雄;Zhu, Feng-jun;Wu, Horng-yu;Lin, Ming-chieh;Lee, Shyong;Wang, Woei-ren
Contributors:	工學院機械工程學系
Keywords:	Characterization and Evaluation of Materials;Chemistry and Materials Science;Corrosion and Coatings;Engineering Design;Materials Science;Quality Control;Reliability;Safety and Risk;Tribology
Date:	2015-05-01
Issue Date:	2026-04-23 15:14:11 (UTC+8)
Publisher:	Springer New York;Boston: Springer US
Abstract:	摘要： The hot workability of homogenized 6069 Al alloy cast ingot was examined via hot compression tests. These tests were conducted using Gleeble-3500 thermal simulation machine within a temperature range of 300-550 °C and a strain rate range of 0.001-10 s −1 . The compression data were then used to construct a processing map, through which a safe processing region was identified. The safe processing region could be divided into dynamic recovery and dynamic recrystallization domains. The variation in microstructure was related to the variation in efficiency of power dissipation, as indicated by microstructure observations. Dynamic recovery was observed in regions associated with the intermediate efficiency of power dissipation, whereas partial dynamic recrystallization occurred in regions with high efficiency. Flow instability was found to be related to flow localization. The strain rate sensitivity m map showed that flow localization occurred because of the deformation conditions with low m values. The kinetic analysis revealed a decrease in apparent activation energy with increased temperature in the partial dynamic recrystallization region. 其他題名： J. of Materi Eng and Perform 出版者： Boston: Springer US 出版日期： 2015-05-01 出處： Journal of materials engineering and performance, 2015-05, Vol.24 (5), p.2051-2059 資源來源： OmniFile Full Text Select(H.W. Wilson)-EBSCOhost全文資料庫版權： ASM International 2015 識別號： ISSN: 1059-9495 識別號： EISSN: 1544-1024 識別號： DOI: 10.1007/s11665-015-1474-5
Appears in Collections:	[Departmant of Mechanical Engineering ] journal & Dissertation

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