Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion

In order to apply conventional forming processes at the micro scale, the size effects caused by material properties and frictional effects must be taken into account. In this research, the effects of tool surface properties such as punch surface grooves on microextrudability, assessed using extrusio...

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Autores principales:	Tatsuya Funazuka, Kuniaki Dohda, Tomomi Shiratori, Ryo Hiramiya, Ikumu Watanabe
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	microextrusion size effect microtexture grain size aluminum alloy Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/3ce64de0fbb94689bd3418a448cb6678
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spelling	oai:doaj.org-article:3ce64de0fbb94689bd3418a448cb66782021-11-25T18:22:55ZEffect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion10.3390/mi121112992072-666Xhttps://doaj.org/article/3ce64de0fbb94689bd3418a448cb66782021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1299https://doaj.org/toc/2072-666XIn order to apply conventional forming processes at the micro scale, the size effects caused by material properties and frictional effects must be taken into account. In this research, the effects of tool surface properties such as punch surface grooves on microextrudability, assessed using extrusion force, shape of the extrusion, and Vickers hardness, were investigated using an AA6063 billet. Microscale grooves of 5 to 10 µm were fabricated on the punch surface. The extrusion force increased rapidly as the stroke progressed for all the grooves. Comparing the product geometries showed that, the smaller the groove size, the lower the adhesion and the longer the backward extrusion length. The results of material analysis using EBSD showed that a 5 µm groove depth punch improved the material flowability and uniformly introduced more strain. On the other hand, material flowability was reduced and strain was applied nonuniformly when a mirror-finish tool was used. Therefore, the tribology between the tool and the material was controlled by changing the surface properties of the punch to improve formability.Tatsuya FunazukaKuniaki DohdaTomomi ShiratoriRyo HiramiyaIkumu WatanabeMDPI AGarticlemicroextrusionsize effectmicrotexturegrain sizealuminum alloyMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1299, p 1299 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	microextrusion size effect microtexture grain size aluminum alloy Mechanical engineering and machinery TJ1-1570
spellingShingle	microextrusion size effect microtexture grain size aluminum alloy Mechanical engineering and machinery TJ1-1570 Tatsuya Funazuka Kuniaki Dohda Tomomi Shiratori Ryo Hiramiya Ikumu Watanabe Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion
description	In order to apply conventional forming processes at the micro scale, the size effects caused by material properties and frictional effects must be taken into account. In this research, the effects of tool surface properties such as punch surface grooves on microextrudability, assessed using extrusion force, shape of the extrusion, and Vickers hardness, were investigated using an AA6063 billet. Microscale grooves of 5 to 10 µm were fabricated on the punch surface. The extrusion force increased rapidly as the stroke progressed for all the grooves. Comparing the product geometries showed that, the smaller the groove size, the lower the adhesion and the longer the backward extrusion length. The results of material analysis using EBSD showed that a 5 µm groove depth punch improved the material flowability and uniformly introduced more strain. On the other hand, material flowability was reduced and strain was applied nonuniformly when a mirror-finish tool was used. Therefore, the tribology between the tool and the material was controlled by changing the surface properties of the punch to improve formability.
format	article
author	Tatsuya Funazuka Kuniaki Dohda Tomomi Shiratori Ryo Hiramiya Ikumu Watanabe
author_facet	Tatsuya Funazuka Kuniaki Dohda Tomomi Shiratori Ryo Hiramiya Ikumu Watanabe
author_sort	Tatsuya Funazuka
title	Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion
title_short	Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion
title_full	Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion
title_fullStr	Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion
title_full_unstemmed	Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion
title_sort	effect of punch surface grooves on microformability of aa6063 backward microextrusion
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3ce64de0fbb94689bd3418a448cb6678
work_keys_str_mv	AT tatsuyafunazuka effectofpunchsurfacegroovesonmicroformabilityofaa6063backwardmicroextrusion AT kuniakidohda effectofpunchsurfacegroovesonmicroformabilityofaa6063backwardmicroextrusion AT tomomishiratori effectofpunchsurfacegroovesonmicroformabilityofaa6063backwardmicroextrusion AT ryohiramiya effectofpunchsurfacegroovesonmicroformabilityofaa6063backwardmicroextrusion AT ikumuwatanabe effectofpunchsurfacegroovesonmicroformabilityofaa6063backwardmicroextrusion
_version_	1718411250050793472

Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion

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