ALFARIDZI, RAYHAN (2026) ANALISIS PENGARUH PROSES FLAPPEENING TERHADAP KEKASARAN, KEKERASAN DAN MIKROSTRUKTUR ALUMINIUM EXTRUSION 7075-T6511 HASIL PROSES MILLING. S1 thesis, Universitas Mercu Buana Jakarta.
|
Text (HAL COVER)
Cover.pdf Download (909kB) | Preview |
|
![[img]](https://repository.mercubuana.ac.id/style/images/fileicons/text.png) |
Text (BAB I)
Bab 1.pdf Restricted to Registered users only Download (98kB) |
|
|
Text (BAB II)
Bab 2.pdf Restricted to Registered users only Download (890kB) |
|
|
Text (BAB III)
Bab 3.pdf Restricted to Registered users only Download (782kB) |
|
|
Text (BAB IV)
Bab 4.pdf Restricted to Registered users only Download (1MB) |
|
|
Text (BAB V)
Bab 5.pdf Restricted to Registered users only Download (26kB) |
|
|
Text (DAFTAR PUSTAKA)
Daftar Pustaka.pdf Restricted to Registered users only Download (123kB) |
|
|
Text (LAMPIRAN)
Lampiran.pdf Restricted to Registered users only Download (428kB) |
Abstract
Aluminium alloy 7075-T6511 is one of the materials widely used in the aerospace industry due to its high specific strength; however, its mechanical properties can still be improved through surface treatment processes. This study aims to investigate the effect of flappeening on crack susceptibility in aluminium extrusion 7075-T6511, to analyze the surface roughness and hardness of the milled aluminium extrusion 7075-T6511 after undergoing the flappeening process, and to examine the impact of flappeening on microstructure and its relationship to crack resistance of the material. The independent variable in this research is the variation of flappeening treatment with different rotational speed (RPM) parameters, while the dependent variables include average surface roughness (Ra), hardness (Vickers), microstructural changes, and absorbed energy in the impact test. The research samples consist of aluminium extrusion 7075-T6511 specimens prepared through milling before being subjected to flappeening treatment. Samples were selected using purposive sampling, namely the selection of specimens based on laboratory testing eligibility criteria. The tests conducted include surface roughness measurement using a profilometer, hardness testing with the Vickers method, microstructural examination using an optical microscope, and impact testing using the Charpy method to determine resistance against sudden loads. The obtained data were analyzed to identify significant differences among the treatment variations. The experimental results indicate an increase in material hardness by 7.27%. SEM analysis shows a reduction in the number of voids. XRD testing reveals that the residual stress, which was initially tensile at +184 MPa, changed to compressive stress, thereby enhancing the material’s resistance to crack initiation and propagation. In addition, impact testing demonstrates an improvement in the material’s impact resistance to 19 J. Therefore, the flappeening process is proven to effectively enhance the crack resistance of the material. Keyword: Flappeening, Milling, Aluminium, 7075, Residual Stress, SEM, Impact, Vickers Aluminium alloy 7075-T6511 merupakan salah satu material yang banyak digunakan pada industri kedirgantaraan karena memiliki kekuatan spesifik tinggi, namun sifat mekanisnya masih dapat ditingkatkan melalui proses perlakuan permukaan. Penelitian ini bertujuan untuk mengetahui pengaruh flappeening terhadap kerentanan crack pada aluminium extrusion 7075-T6511, menganalisis tingkat kekasaran dan kekerasan pada aluminium extrusion 7075-T6511 hasil milling setelah melalui proses flappeening, serta mengkaji dampak flappeening terhadap struktur mikro dan hubungannya dengan ketahanan crack material. Variabel bebas dalam penelitian ini adalah variasi perlakuan flappeening dengan perubahan parameter rotational speed (RPM), sedangkan variabel terikat mencakup nilai kekasaran rata-rata (Ra), kekerasan (Vickers), perubahan struktur mikro, dan energiserapan pada uji impact. Sampel penelitian berupa spesimen aluminium extrusion 7075-T6511 yang dipersiapkan melalui proses milling sebelum diberi perlakuan flappeening. Pemilihan sampel dilakukan dengan purposive sampling, yaitu pemilihan spesimen sesuai kriteria kelayakan uji laboratorium. Pengujian meliputi uji kekasaran permukaan menggunakan profilometer, uji kekerasan dengan metode Vickers, uji struktur mikro menggunakan mikroskop optik, serta uji impact metode Charpy untuk menentukan ketahanan terhadap beban kejut. Data yang diperoleh dianalisis untuk mengidentifikasi perbedaan signifikan antar variasi perlakuan. Data hasil pengujian menunujukkan terjadi peningkatan kekerasan sebesar 7.27%, Pengujian SEM yang menunjukkan adanya penurunan jumlah void, Pengujian XRD yang semula menunjukkan tegangan sisa yang bersifat Tarik +184 Mpa berubah menjadi bersifat tekan sehingga semakin membuat material menjadi tahan crack, dan uji impact yang menunjukkan ketahanan impact material semakin meningkat menjadi 19 J, Oleh karena itu, Proses Flappeening terbukti mampu memperbaiki ketahanan crack material Kata Kunci: Flappeening, Milling, Aluminium, 7075, Residual Stress, SEM, Impact, Vickers
| Item Type: | Thesis (S1) |
|---|---|
| NIM/NIDN Creators: | 41321120049 |
| Uncontrolled Keywords: | Flappeening, Milling, Aluminium, 7075, Residual Stress, SEM, Impact, Vickers |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin 600 Technology/Teknologi > 670 Manufacturing/Manufaktur, Pabrik-pabrik 700 Arts/Seni, Seni Rupa, Kesenian > 730 Plastic Arts and Sculpture/Seni Plastik dan Seni Patung > 738 Ceramics Arts/Seni Keramik > 738.1 Techniques and Procedures of Ceramics Arts/Teknik Seni Keramik, Prosedur Seni Keramik > 738.12 Materials/Bahan |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | khalimah |
| Date Deposited: | 21 Feb 2026 07:46 |
| Last Modified: | 21 Feb 2026 07:46 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/101082 |
Actions (login required)
 |
View Item |
