Book ChapterDOI
Effect of Severe Plastic Deformation on the Mechanical Properties of Al6061 Alloy
Vagish D. Mishra,Karthik Palaniappan,Balkrishna C. Rao,H. Murthy +3 more
- pp 2113-2116
TLDR
In this paper, the effect of cold-rolling and machining on microstructure and mechanical properties of Al6061 was investigated, and it was shown that metal cutting (single-stage process) and thickness reduction greater than 50% by coldrolling (multi-stage) provide nearly the same enhancement in mechanical properties (40% more than bulk).Abstract:
Large plastic deformation through cold-rolling refines microstructure through the accumulation of plastic strains over multiple stages. Machining achieves similar large plastic strains (1–10) in a single stage to produce ultra-fine-grained chips. Effect of cold-rolling and machining on microstructure and mechanical properties of Al6061 was investigated. As-received, solution heat-treated, and peak-aged plates were cold-rolled to 30, 50, and 70% thickness reductions. Ultra-fine-grained chips were produced from low-speed orthogonal-machining under plane-strain condition, using a restricted contact tool to minimize the chip curvature. Grains were equiaxed in as-received, solution heat-treated, and peak-aged bulk samples, while they were elongated in cold-rolled bulk. In chips, grains were elongated in one direction due to severe plastic flow. Hardness and ultimate tensile strength increased with thickness reduction. Chip hardness is 60% more than as-received material due to microstructure refinement. Metal cutting (single-stage process) and thickness reduction greater than 50% by cold-rolling (multi-stage) provide nearly the same enhancement in mechanical properties (40% more than bulk).read more
References
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Book
Metal cutting principles
TL;DR: In this paper, the authors describe typical cutting operations, including: Elastic Behaviour Plastic Behaviour Fracture Dynamometry Shear Strain in Cutting Shear Stress in Cutting Friction Wear and Tool Life Cutting Temperatures Cutting Fields Tool Materials Work Material Considerations Complex Tools Surface Integrity Chip Control Optimisation Modeling of Chip Formation Precision Engineering Unusual Applications of the Metal Cutting Process
Journal ArticleDOI
Large strain deformation and ultra-fine grained materials by machining
Srinivasan Swaminathan,M. Ravi Shankar,Seongyl Lee,Jihong Hwang,Alexander H. King,Renae F. Kezar,Balkrishna C. Rao,Travis L. Brown,Srinivasan Chandrasekar,W. Dale Compton,Kevin P. Trumble +10 more
TL;DR: In this article, the deformation fields associated with chip formation in plane strain machining are described and the ability to impose very large strain deformation in a controlled manner is highlighted.
Journal ArticleDOI
Characteristics of aluminum 6061-T6 deformed to large plastic strains by machining
TL;DR: In this article, a study of characteristics of precipitation treatable aluminum alloys (6061-T6) deformed to large plastic strains, by analyzing chips created by plane strain machining, was made.
Journal ArticleDOI
Production of fine-grained foils by large strain extrusion-machining of textured Ti–6Al–4V
TL;DR: In this article, a modification of texture in Ti-6Al-4V was proposed to suppress shear localization by cold-rolling before extrusion-machining, leading to fine-grained continuous foils with increased hardness.
Journal ArticleDOI
Enhancement of Mechanical Properties by Cold-Rolling of Al6061
TL;DR: In this paper, the enhancement of mechanical properties of Aluminium alloy, Al6061, due to cold-rolling is compared with that due to peak-ageing, and the results showed that the enhancement was comparable to the more complex severe plastic deformation process of cryo-rolling followed by warm-rolling, and no significant difference was found in the tensile strength between rolling and transverse directions.
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