Micro-scaled plastic deformation behavior of biodegradable AZ80 magnesium alloy: experimental and numerical investigation

Microforming is a promising technology in manufacturing micro parts through plastic deformation. In manufacturing of micro part, grain size and material behavior plays a very important role in material flow, yield strength, surface roughness, and microhardness of the micro part. In this work, a gene...

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Bibliographic Details
Published inInternational journal of advanced manufacturing technology Vol. 102; no. 9-12; pp. 3531 - 3541
Main Authors Srinivasan, N., Rajenthirakumar, D., Sridhar, R.
Format Journal Article
LanguageEnglish
Published London Springer London 01.06.2019
Springer Nature B.V
Subjects
Biodegradability
CAE) and Design
Coefficient of friction
Coefficient of variation
Computer-Aided Engineering (CAD
Engineering
Friction
Grain size
Industrial and Production Engineering
Magnesium base alloys
Mathematical analysis
Mechanical Engineering
Media Management
Microhardness
Original Article
Plastic deformation
Size effects
Surface layers
Surface roughness
Tooling
Grain size
Interfacial friction
Plastic deformation
Microforming
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Summary:Microforming is a promising technology in manufacturing micro parts through plastic deformation. In manufacturing of micro part, grain size and material behavior plays a very important role in material flow, yield strength, surface roughness, and microhardness of the micro part. In this work, a generic microextrusion tooling system is developed and biodegradable AZ80 magnesium with four different grain sizes is experimented to analyze the material behavior and grain size effect based on the punch force, microhardness, and interfacial friction. It is attempted to minimize the interfacial friction using two different die coatings. It is found that size, boundary, and distribution of grains have severe effect in the microextrusion process. Microhardness values at the surface layer and radial location show an adverse effect on overall hardness distribution of the micro part due to inhomogeneous deformation. The quantitative variation in interfacial friction is determined with different friction coefficient by numerical evaluation. This research provides the fundamental understanding about the microextrusion process on AZ80 magnesium and facilitates the development of microimplant.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-019-03440-8