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ITS » Paper and Presentation » Teknik Perkapalan
Posted by ansi@its.ac.id at 14/12/2012 09:34:32  •  1653 Views


EFFECT OF TOOL TRAVEL SPEED IN ALUMINIUM 5083 JOINTS QUALITY AND METALLURGY ON PRE-FABRICATION ALUMINIUM PANEL SHIP SUPERSTRUCTURE WITH FRICTION STIR WELDING PROCESS

Author :
SEDANAYOGA, I PUTU GEDE BAYU ARYA ( 4108100012 )




ABSTRAK

Pada umumnya pengelasan aluminium menggunakan proses fussion welding seperti MIG maupun TIG. Namun pada kedua metode tersebut terdapat kemungkinan terbentuknya cacat berupa porositas crack dan rawan terjadi deformasi selama proses pendinginan dan pembentukan logam las sehingga untuk mengatasi kekurangan proses MIG dan TIG pada pengelasan aluminium digunakan alternatif lain yaitu dengan metode friction stir welding. Proses pengelasan friction stir welding dilakukan dengan menggunakan mesin frais tipe PM 1 HU pada pelat aluminium paduan 5083 setebal 4 mm. Parameter proses menggunakan RPM tetap sebesar 1084 dan empat variasi tool travel speed sebesar 20 mmmenit 25 mmmenit 36 mmmenit dan 43 mmmenit. Analisa hasil pengelasan tersebut meliputi jenis dan ukuran defect serta besarnya temperatur pada permukaan weld joint. Dari hasil percobaan diketahui bahwa terjadi incomplete penetration IP weld flash joint remnant dan surface irregularities pada semua spesimen. Penggunaan parameter travel speed 20 mmmenit akan menghasilkan temperatur tertinggi serta ukuran diskontinuitas IP terkecil yaitu 185.95 oC dan 0.58 mm. Sedangkan penggunaan parameter travel speed 43 mmmenit akan menghasilkan temperatur terendah serta ukuran diskontinuitas IP terbesar yaitu 160.63 oC dan 1.07 mm. Dari pengujian micro hardness vickers didapatkan bahwa nilai kekerasan HAZ dan TMAZ lebih rendah daripada kekerasan weld nugget sebagai akibat paparan temperatur pengelasan yang mengubah struktur mikro dan ukuran butir selama proses pengelasan.


ABSTRACT

Generally aluminium welding process is done by fussion welding such as MIG and TIG welding but with both of this methods there are possibility of defect formation such as porosity crack and prone to deformation during the cooling and solidification of weld metal. So to overcome the shortcomings of both MIG and TIG welding proces friction stir welding method is used as an alternative welding process. Friction stir welding process is done by using a milling machine PM 1 HU type and its performed on 4 mm thickness aluminum alloy 5083 plate. The process parameters using fixed RPM at 1084 and four variations of tool travel speed by 20 mmmin 25 mmmin 36 mmmin and 43 mmmin. Analysis of the results of welding include the type and size of the defect and the magnitude of the temperature on the weld joint surface. From the experimental results its known that there was incomplete penetration IP joint remnant weld flash and surface irregularities on all specimens. The use of parameter travel speed 20 mmmin will result in the highest temperature and the smallest IP discontinuity is 185.95 C and 0.58 mm. While the use of parameter travel speed 43 mm min will result in the lowest temperature and the largest IP discontinuity is 160.63 C and 1.07 mm. From Vickers micro hardness testing its found that the HAZ and TMAZ hardness lower than weld nugget hardness as a result of welding temperatures exposure that alter the microstructure and grain size during the welding process.



KeywordsDefect; Friction Stir Welding (FSW); metalurgi; temperatur pengelasan; tool travel speed
 
Subject:  Aluminium--metalurgy ; friction welding
Contributor
  1. Ir. Achmad Zubaydi, M.Eng., Ph.D.
  2. Ir. Soeweify, M.Eng
Date Create: 12/07/2012
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-paper-410211120001474
Collection ID: 410211120001474
Call Number: RSPe 669.722 Sed s


Source
Paper and Presentation Naval Architecture and Ship Building Engineering,RSPe 669.722 Sed s, 2012

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Copyright @2012 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




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ITS-paper-410211120001474-22663.pdf




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