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REVITALISASI KOLAM IKAN TERNAK DAN TAMAN DESA TEJOMOYO, TELUKAN, GROGOL SUKOHARJO PADA KKN TEMATIK STT WARGA SURAKARTA Prihatin, Joko Yunianto; Pradana, David Bintang; Zainussyoim, Fiddo; Saputro, Febrian Titok Sasmo; Sanjaya, Tegar Tirta; Pangestu, Lucky Akbar; Akmal, Yushario; Masum, Irvan Amir
Abdi Masya Vol 5 No 2
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/abdimasya.v5i2.434

Abstract

ABSTRACT Thematic real work lectures (KKNT) are community service programs carried out by students by focusing on certain themes or issues, KKNT aims to enable students to implement the knowledge and skills that have been acquired during lectures so that they can make change or sustainable development. The problems encountered after conducting surveys and discussions with residents of Tejomoyo village, Telukan Subdistrict, were that the village park and village fish pond which were previously managed by the women's farmer group (KWT) were stalled and neglected. So the main focus is implementing the work program to revitalize livestock fish ponds and village parks towards food security independence. The result of this activity is that the village park is functioning again for gathering to foster kinship between residents and the catfish pond along with the circulation of pond water management is functioning well. Apart from that, they also participate in village activities, such as standing meetings, walking, distributing social assistance. KKNT students contributed to the local Karangtaruna in Karangtaruna activities, such as the tirakatan to welcome the 79th independence of the Republic of Indonesia and the Tejomoyo RT01 RW13 community walk.
A PENGARUH VARIASI KOMPOSISI CAMPURAN CARBON ARANG CANGKANG KEMIRI DAN NATRIUM KARBONAT TERHADAP KEKERASAN DAN KEAUSAN PADA MILD STEEL DENGAN PROSES PACK CARBURIZING Pradana, David Bintang; Supriyanto, Agung; Faishal, Afif
Teknika Vol 10 No 2 (2025): October 2025
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/teknika.v10i2.602

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh variasi komposisi campuran arang cangkang kemiri dan natrium karbonat (Na?CO?) terhadap kekerasan dan ketahanan aus baja karbon rendah (mild steel) melalui proses pack carburizing. Variasi komposisi yang digunakan adalah 60%:40%, 70%:30%, 80%:20%, dan 90%:10% antara arang cangkang kemiri dan Na?CO?. Proses karburisasi dilakukan pada suhu 930 oC untuk memungkinkan difusi karbon ke permukaan baja, diikuti dengan pengujian kekerasan metode Vickers, uji keausan metode Ogoshi, serta analisis komposisi kimia permukaan menggunakan EDX. Hasil penelitian menunjukkan bahwa perlakuan pack carburizing meningkatkan kekerasan baja secara signifikan dibandingkan material awal, dengan kekerasan tertinggi (231,46 HV) diperoleh pada komposisi 80% arang cangkang kemiri 20% Na?CO?. Selain itu, ketahanan aus juga meningkat pada variasi komposisi 90%:10%, dengan nilai keausan spesifik 0,000029103 mm3/kg.m. Analisis EDX mengindikasikan peningkatan kandungan karbon di permukaan baja membuktikan keberhasilan proses difusi karbon.