eprintid: 58245 rev_number: 16 eprint_status: archive userid: 13153 dir: disk0/00/05/82/45 datestamp: 2026-02-11 05:23:19 lastmod: 2026-02-11 05:23:19 status_changed: 2026-02-11 05:23:19 type: thesis metadata_visibility: show contact_email: 3334210058@untirta.ac.id creators_name: Naila Yasmin, Sheril creators_id: 3334210058 contributors_type: http://www.loc.gov/loc.terms/relators/THS contributors_type: http://www.loc.gov/loc.terms/relators/THS contributors_name: Uswatun Hasanah, Indah contributors_name: Mabruri, Efendi contributors_id: 199012142019032022 contributors_id: 197001051996031002 corp_creators: Fakultas Teknik Universitas Sultan Ageng Tirtayasa title: Studi Pembuatan Medium Entropy Alloy (MEA) dengan Pengaruh Penambahan Aluminium (Al) dan Temperatur Annealing terhadap Sifat Mekanik Paduan (FeNiCo)100-xAlx ispublished: pub subjects: TN subjects: TS divisions: Metalurgi full_text_status: restricted keywords: medium entropy alloy, aluminium, annealing, sifat mekanik, dan struktur mikro abstract: Medium entropy alloy (MEA) berbasis FeNiCo menarik untuk dikembangkan karena berpotensi memiliki kombinasi kekuatan dan stabilitas struktur mikro yang baik, serta sifatnya dapat direkayasa melalui penambahan unsur paduan dan perlakuan panas. Aluminium (Al) diketahui mampu memodifikasi kestabilan fasa dan mekanisme penguatan, seperti kecenderungan terbentuknya fasa BCC/B2. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan aluminium (Al) dan temperatur annealing terhadap evolusi struktur mikro serta sifat mekanik medium entropy alloy (FeNiCo)100-xAlx. Variasi komposisi Al digunakan pada rentang x = 0,25, 0,5, 0,75, dan 1. Sampel dibuat melalui proses pengecoran (as cast), kemudian diberi perlakuan panas annealing pada temperatur 600°C, 800°C, dan 1000°C selama 5 jam diikuti pendinginan cepat (water quench). Karakterisasi struktur mikro dilakukan menggunakan metalografi optik (OM), SEM-EDS, dan XRD, sedangkan sifat mekanik dievaluasi melalui uji kekerasan Micro Vickers dan uji tekan untuk memperoleh nilai yield stress dan toughness. Hasil penelitian menunjukkan bahwa peningkatan komposisi Al memberikan pengaruh signifikan terhadap peningkatan kekerasan dan perubahan karakter struktur mikro, yang berkaitan dengan penguatan larutan padat serta kecenderungan terbentuknya fasa teratur atau keras berbasis aluminida (BCC/B2) pada kadar Al yang lebih tinggi. Perlakuan annealing memengaruhi homogenisasi segregasi dan perubahan morfologi fasa. Secara umum, nilai kekerasan meningkat setelah annealing 600°C kemudian menurun pada 800°C dan 1000°C. Tren perubahan yield stress menunjukkan ketergantungan pada kompetisi antara penguatan akibat ordering atau presipitasi halus dan pelemahan akibat recovery dan rekristalisasi serta grain growth pada temperatur annealing yang lebih tinggi. Dengan demikian, kombinasi komposisi Al dan temperatur annealing berperan penting dalam mengendalikan struktur mikro dan respons mekanik paduan (FeNiCo)100-xAlx. date: 2026 date_type: published pages: 189 institution: Fakultas Teknik Universitas Sultan Ageng Tirtayasa department: Teknik Metalurgi thesis_type: sarjana thesis_name: sarjana referencetext: [1] W. Jiang, Y. Zhu, and Y. Zhao, “Mechanical Properties and Deformation Mechanisms of Heterostructured High-Entropy and Medium-Entropy Alloys : A Review,” vol. 8, no. January, pp. 1–17, 2022, doi: 10.3389/fmats.2021.792359. [2] M. Schneider and G. Laplanche, “Effects of temperature on mechanical properties and deformation mechanisms of the equiatomic CrFeNi medium-entropy alloy,” Acta Mater., vol. 204, p. 116470, 2021, doi: 10.1016/j.actamat.2020.11.012. [3] F. Da, C. Garcia, R. O. Ritchie, and M. 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Pap., pp. 1095–1108, 2008, doi: 10.1107/S0021889808031762. funders: Badan Riset dan Inovasi Nasional citation: Naila Yasmin, Sheril (2026) Studi Pembuatan Medium Entropy Alloy (MEA) dengan Pengaruh Penambahan Aluminium (Al) dan Temperatur Annealing terhadap Sifat Mekanik Paduan (FeNiCo)100-xAlx. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa. document_url: https://eprints.untirta.ac.id/58245/1/Sheril%20Naila%20Yasmin_3334210058_Fulltext.pdf document_url: https://eprints.untirta.ac.id/58245/2/Sheril%20Naila%20Yasmin_3334210058_01.pdf document_url: https://eprints.untirta.ac.id/58245/3/Sheril%20Naila%20Yasmin_3334210058_02.pdf document_url: https://eprints.untirta.ac.id/58245/4/Sheril%20Naila%20Yasmin_3334210058_03.pdf document_url: https://eprints.untirta.ac.id/58245/5/Sheril%20Naila%20Yasmin_3334210058_04.pdf document_url: https://eprints.untirta.ac.id/58245/6/Sheril%20Naila%20Yasmin_3334210058_05.pdf document_url: https://eprints.untirta.ac.id/58245/7/Sheril%20Naila%20Yasmin_3334210058_Ref.pdf document_url: https://eprints.untirta.ac.id/58245/8/Sheril%20Naila%20Yasmin_3334210058_Lamp.pdf document_url: https://eprints.untirta.ac.id/58245/9/Sheril%20Naila%20Yasmin_3334210058_CP.pdf