Rancang Bangun Reciprocating Sliding Tribometer Untuk Analisis Keausan Pada Implan Austenistik Stainless Steel 316L

Zulkarnaen, Yosua (2020) Rancang Bangun Reciprocating Sliding Tribometer Untuk Analisis Keausan Pada Implan Austenistik Stainless Steel 316L. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dewasa ini penggunaan material sudah mengalami kemajuan, khususnya pada bidang medis. Dalam bidang medis sering kita jumpai praktik penggunaan implan untuk berbagai kasus seperti kondisi patah pada tulang. Stainless steel 316L umum digunakan sebagai material implan karena sifat biokompatibilitas yang tinggi dan memiliki kekuatan yang sesuai dengan kebutuhan implan tulang. Standar internasional AISI F138 memberikan persyaratan dari segi kekuatan mekanik dan komposisi kimia. Sifat lain seperti ketahanan aus perlu juga dipertimbangkan agar material juga memiliki lifetime atau umur pakai yang lama dan tidak menghasilkan partikel aus yang dapat menyebabkan iritasi. Sayangnya alat uji wear resistance belum tersedia di Laboratorium Metalurgi Teknik Mesin ITS. Oleh karena itu dalam tugas akhir kali ini dilakukan proses desain rancang bangun dan prototyping reciprocating sliding tribometer sehingga dapat dilakukan pengujian wear resistance di laboratorium Metalurgi Teknik Mesin ITS. Tribometer yang dibuat adalah tribometer berjenis reciprocating sliding tribometer dengan mekanisme pembebanan pin-on-plate. Desain dari tribometer ini dilakukan berdasarkan berdasarkan reverensi tribometer Resmat Tribocorrosion tool produksi Canada. Untuk menunjang kemampuan tribometer dalam pengujian Coefficient of Friction (CoF), tribometer ini dilengkapi dengan sensor berupa load cell sehingga data beban normal dan beban gesek dapat terus menerus dimonitor selama proses sliding berlangsung. Kelebihan lainnya adalah fitur dry & wet wear test kit yang dapat menunjang pengujian pada spesimen dalam kondisi kering maupun dalam kondisi basah. Setelah proses rancang bangun tribometer selesai, dilakukan pengujian pada gerak reciprocating sliding untuk menguji akurasi tribometer. Sebelum digunakan, compression load cell telah dipastikan memiliki nilai yang akurat dan presisi melalui uji error dan deviasi standar. Selanjutnya dilakukan uji pengaruh pembebanan pada spesimen terhadap kecepatan reciprocating sliding, apakah pembebanan tersebut mengakibatkan perlambatan yang mempengaruhi kecepatan reciprocating sliding. Setelah dilakukan uji berupa pengukuran kecepatan reciprocating sliding ketika diberikan beban masing-masing sebesar; 10N, 20N, dan 30N, didapatkan hasil akhir yaitu terjadi perlambatan rata-rata untuk setiap pembebanan yaitu sebesar 0.441%, 0.585%, dan 0.613% terhadap kecepatan reciprocating sliding tanpa pembebanan. Karena nilai perlambatan yang dihasilkan berada dibawah 1%, faktor perlambatan pembebanan ini dapat diabaikan karena besarnya dianggap tidak signifikan. Sehingga disimpulkan jika kecepatan reciprocating sliding stabil dan nilai beban yang diberikan pada compression load cell sudah sesuai maka secara teori hasil pengujian tribometer ini sudah benar. Namun masih perlu dilakukan percobaan tambahan untuk membuktikan apakah hasil pengujian tribometer ini sudah sesuai ================================================================================================================== Nowadays, the application of materials has reached an advancement, especially in the medical field. We oftenl find the application of implant for various medical cases, such as bone fracture. 316L stainless steel is a material that oftenl used as an implant because it’s biocompatibility and strength that support the application as an implant. The international AISI F138 standard has specified some requirements for implant material such as mechanical strength and the chemical composition. Another property such as wear resistance also very important to consider, because it will determine the lifetime of the implant and whether it will generate wear particles that can cause irritation or not. Unfortunately, there is no wear resistance test machine available in the Metallurgical Laboratory of Mechanical Engineering ITS. Therefore, this final project is aimed to make a design and prototype of a reciprocating sliding tribometer to improve the wear testing facility on Metallurgical Laboratory. The tribometer that has been created is a reciprocating sliding tribometer type with a pin-on-plate loading mechanism. The design of the reciprocating sliding tribometer is based on The Resmat Tribocorrosion tool as the main reference. This tribometer is also equipped with load cells to measure the Coefficient of Friction (CoF). Every load and force applied to the load cell will be recorded. Another feature that improves this tribometer is wet and dry specimen test kit that can accommodate wear test in either dry or wet test environment. After the design and prototyping process is finished, some series of tests are run. First is the accuracy and precision test of the load cell through the error and standard deviation calculation. After we make sure that the load cell is accurate and precise, now it is the time for the speed reduction test. From this test, it can be determined that whether the load applied to the specimen will affect the reciprocating sliding movement speed or not. At the end of the test, the results are; at 10N of normal load it reduced 0.441% of the reciprocating speed, at 20N of normal force it reduced 0.585% of the reciprocating speed, and at 30N of normal force it reduced 0.613% of the reciprocating speed. Since the average percent reduction of reciprocating speed due to loading is less than 1%, this factor is neglected because it is not significant. At the end of the test, when the reciprocating sliding movement is not affected by loading, and the compression load cell is already accurate and precise, it can be assumed that the result of this tribometer will be valid. However, sequences of test must be done to make sure that the result of this tribometer is true

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: tribometer, stainless steel 316L, pin-on-plate tribometer, stainless steel 316L, pin-on-plate
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Yosua Zulkarnaen
Date Deposited: 27 Aug 2020 03:09
Last Modified: 27 Aug 2020 03:09
URI: https://repository.its.ac.id/id/eprint/80871

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