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Agustiningtyas, Diah Tri
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Pengaruh Faktor Geografi Terhadap Karakteristik Bambu Petung Laksono, Andromeda Dwi; Agustiningtyas, Diah Tri
SPECTA Journal of Technology Vol 3 No 1 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v3i1.115

Abstract

In this study was about a comparison of geographic factors towards the characterization of petung bamboo in Indonesia and the Philippines. Bamboo is one of the plants that has advantages in the field of technical materials based on developments in composite materials and is found in various regions. In general, bamboo has lignin and cellulose, where the morphology and nature of both bamboos are not the same from different countries. Therefore,material testing was carried out on each Indonesian and Filipino petung bamboo using material characterization testing methods. The process of Differential Scanning Calorimetry (DSC) was carried out to measure calorimetry with the yield of melting point in Philippine petung bamboo at 341ºC which is lower than the melting point in Indonesian petung bamboo which is 354.34ºC. In this DSC test, quantitative and qualitative results were obtainedin the form of phase changes, melting, and transition temperatures that occurred. Then an Energy Dispersive Spectrometer (EDS) was analyzed and the carbon content of cellulose and lignin was higher in Indonesian petung bamboo, respectively 65.29 wt.% And 66.05 wt.%. The morphology of bamboo shows that the fibers and matrices present in Philippine petung bamboo are denser than those of Indonesian petung bamboo. The highest peak value based on X-Ray Diffraction (XRD) is found in Philippine petung bamboo at 2? of 34.49 and cubic phase.
Pengaruh Perlakuan Panas Baja Tahan Karat Martensitik AISI 410 terhadap Struktur Mikro dan Ketahanan Korosi di Lingkungan Simulasi Geothermal dalam Larutan Artificial Brine Prasetyo, Mukhlis Agung; Anwar, Moch. Syaiful; Mabruri, Efendi; Agustiningtyas, Diah Tri; Noviana, Rekha Chantya; Laksono, Andromeda Dwi
TEKNIK Vol 41, No. 2 (2020): August 2020
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v0i0.24690

Abstract

Energi Panas Bumi yang berlimpah memiliki potesi untuk digunakan sebagai pembangkit listrik. Pembangkit listrik panas bumi memanfaatkan uap panas bumi untuk memutar sudu turbin yang kemudian dikonversi menjadi energi listrik. Baja tahan karat martensitik telah digunakan secara komersial untuk material sudu turbin pada turbin panas bumi. Penelitian ini bertujuan untuk mengetahui pengaruh dari perlakuan panas (as-quench dan tempering) terhadap struktur mikro, laju korosi material dan ketahanan korosi sumuran pada baja tahan karat AISI 410. Pengujian mikrostruktur dilakukan dengan menggunakan mikroskop optik dan uji korosi material didalam larutan brine sintetis dengan alat Gamry G750. Pengamatan struktur mikro baja AISI 410 setelah proses annealing adalah ferit dan karbida. Struktur mikro berupa temper martensit berbentuk bilah (lath) dengan austenit sisa dan karbida logam setelah dilakukan proses austenisasi 1050ºC dengan pendinginan cepat (quench) media oli dan temperature tempering 650ºC. Laju korosi dan ketahanan korosi piting sangat tinggi ditemukan pada baja AISI 410 full Annealing.
Co-Authors Anwar, Moch. Syaiful Laksono, Andromeda Dwi Mabruri, Efendi Noviana, Rekha Chantya Prasetyo, Mukhlis Agung