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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/12/11/1299 |
| _version_ | 1797509288129724416 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:15:37Z |
| format | Article |
| id | doaj.art-3ce64de0fbb94689bd3418a448cb6678 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T05:15:37Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-3ce64de0fbb94689bd3418a448cb66782023-11-23T00:25:26ZengMDPI AGMicromachines2072-666X2021-10-011211129910.3390/mi12111299Effect of Punch Surface Grooves on Microformability of AA6063 Backward MicroextrusionTatsuya Funazuka0Kuniaki Dohda1Tomomi Shiratori2Ryo Hiramiya3Ikumu Watanabe4Academic Assembly Faculty of Engineering, University of Toyama, Toyama 930-8555, JapanDepartment of Mechanical Engineering, Northwestern University, Evanston, IL 60201, USAAcademic Assembly Faculty of Engineering, University of Toyama, Toyama 930-8555, JapanGraduate School of Science and Engineering for Education, University of Toyama, Toyama 930-8555, JapanResearch Center for Structural Materials, National Institute for Materials Science, Ibaraki 205-0047, JapanIn 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.https://www.mdpi.com/2072-666X/12/11/1299microextrusionsize effectmicrotexturegrain sizealuminum alloy |
| spellingShingle | Tatsuya Funazuka Kuniaki Dohda Tomomi Shiratori Ryo Hiramiya Ikumu Watanabe Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion Micromachines microextrusion size effect microtexture grain size aluminum alloy |
| title | 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_short | Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion |
| title_sort | effect of punch surface grooves on microformability of aa6063 backward microextrusion |
| topic | microextrusion size effect microtexture grain size aluminum alloy |
| url | https://www.mdpi.com/2072-666X/12/11/1299 |
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