Stress Corrosion Cracking Analysis of the ER70S Wire and SS400 Steel Plate Joints

The susceptibility of weld joints to the Stress Corrosion Cracking (SCC) load alarmed the researchers since pipeline blow-out which were initiated in the area closed to the weld joints. This article is evaluating the SCC resilience of the ER70S wire filler metal to the SS400 plate. The Capacitive Discharge Welding (CDW) with varied angle of the filler metal as an independent variable, whilst the other parameters were kept constant. The joint, then exposed to the SCC load, i.e., dipped in the 1M HCl solution with varied external tensile load to obtain the dependent variable: time to failure (time to brake). The results show that, generally, a sharper wire tip provides higher SCC resilience accept what was shown by the 30? specimen. With the sharper wire tip, the higher volume of weld nugget is provided which guarantee the enough number of weld metal. However, the impact phenomenon in the CDW process splashed this too much nugget beyond the formed joint which is proven by the many spatters in the weld joint. This thrown out nugget substance in turn decrease the intended nugget volume to form the joint. The results show the 60? wire tip angle provide the joint with the highest SCC resilience, indicated by the longest time to brake when loaded with an equal external loa

KARAKTERISASI LAPISAN Ni-Cr BAJA PADA ASME SA 210 C TERHADAP EROSI SUHU TINGGI

Combustion in a high-temperature circulating fluidized bed boiler produces pressurized circulation with silica sand and fly ash particles which can cause damage to pipes due to high-temperature erosional wear. Combustion oxy fuel thermal spray coating method is an alternative to overcome wear and tear. Variations of NiCr alloys were investigated to obtain compositions that could withstand temperatures of 600 °C with a fly ash impact speed of 200 m/s. The main compositions of the metal alloys that have been studied are NiCr, NiCrCo, and NiCrWc. The results of this study indicate that the coating is able to stick to the substrate and survive at 600 °C with a particle impact of 200 m/s in the high temperature erosion test. The highest hardness value obtained by the composition of the NiCr alloy was 177.79 HV and the lowest was found in the composition of the NiCrCo alloy 161.71 HV. The NiCrWc layer is the best layer compared to NiCr and NiCrCo with a weight loss ratio value of -0.00253 gram

NILAI KEARIFAN LOKAL RUMAH TRADISIONAL JAWA

Java has the values that can be taken in relation to the valueof the benefitsof ethicsand aesthetics. Oneform of those value sarejoglo art that havethe local knowledgeof Javanese culture. Model approach in this research is leading to a descriptive qualitative ethnographic, in which the empirical reality a result, demanding researchersgo directly to the location of the study, to be able to live up to their tradition, and the symptomsof everydaylife that is full of socialphenomenalocal culture. This research forms a singlecasestudy stuck. In the context of this casestudy,a traditional Javanese homevisits as a sub unit of analysis,but its existencestill viewed/reviewedas a place that is part of the social systemof the larger society around Surakarta.Java house building structure is one that reflects the composition of spacelike typical building pendhapa,pringgitan, dalem,kitchen, or gadrig andhok.The relation between this structure is a structure which is strongly influenced by the manifestation processmythologyand cosmologyJava). Thismeansthat the traditional Javanesehouseis not just a place to shelter (practical function), but also understoodasa manifestation of the idealsand outlook on life or a symbolicfunction. In this casethe traditional Javanesehousesare not only placed as an autonomouselement, a separate stand alone, but beingseenin context, particularly relevant to the context of alliedJavanesecosmology that underlie the view that the Javanesephilosophyof life. Jawa memiliki nilai-nilai sarat dengan nilai etika dan estetika. Salah satu bentuk nilai-nilai tersebut adalah joglo yang memiliki pengetahuan lokal budaya Jawa. Model pendekatan dalam penelitian ini mengarah ke etnografi deskriptif kualitatif. Realitas empiris diperoleh peneliti langsung ke lokasi penelitian, untuk mendapatkan gambaran tentang kehidupan sesuai dengan tradisi mereka, dan gejala kehidupan sehari-hari yang penuh dengan kearifan loka!. Penelitian ini merupakan studi kasus tunggal terpancang. Dalam konteks studi kasus ini, rumah tradisional Jawa sebagai sub unit analisis, namun keberadaannya masih dipandang sebagai bagian dari sistem sosial masyarakat yang lebih luas di sekitar Surakarta. Struktur bangunan rumah tradisional Jawa mencermi!lkan komposisi ruang bangunan khas seperti: pendhapa, pringgitan, dalem, dapur, atau gadri gandhok. Hubungan antara struktur ini sangat dipengaruhi oleh mitologi proses manifestasi dan kosmologi Jawa. Ini berarti bahwa rumah Jawa tradisional tidak hanya sebuah tempat untuk berlindung (fungsi praktis), tetapi juga dipahami sebagai manifestasi dari cita-cita dan pandangan hidup atau fungsi simbolis. Dalam hal ini rumah-ruma

PENGARUH KOMPOSISI LAPISAN NI-CR PADA BAJA ASME SA 210 C TERHADAP LAJU EROSI SUHU TINGGI

The purpose of this study was to determine the high temperature erosion rate of the NiCr coating on ASME SA 210 C steel using the combustion oxy fuel thermal spray method. In Circulating Fluidized Bed (CFB) boiler, there is circulation of fly ash, silica sand and air in a high temperature environment which causes erosion. High temperature erosion can be minimized by using Ni-Cr alloy coating sing the combustion oxy fuel thermal spray method. NiCr alloy is proved a able to provider a metal alloy layer composition that can withstand temperatures of 600°C with a fly ash impact speed of 200m/s. The metal alloy compositions that have been studied are NiCr, NiCrCo, NiCrWc, NiCrWcCo, and NiCrCoMo. The results of this study indicates that metal alloys are generally atteche to the substrate and withstand at a high temperatures (600°C). The highest hardness provide by NiCrWcCo alloy which is 177.46 HV. The lowest hardness is found in the composition of the NiCrCo alloy (161.71 HV). The lowest high temperature erosion rate was found in the NiCrWcCo alloy, which was -0.00481 gram/minute. This low erosion rate because the NiCrWcCo alloy produces a good weeting effect for metal alloys and has a high hardness value

Implementasi Pendekatan Saintifik dalam Pembelajaran Paket Keahlian Teknik Pemesinan di SMK Negeri 6 Malang

ABSTRAK Prasetyo U., Slamet 2013. Implementasi Pendekatan Saintifik dalam Pembelajaran Paket Keahlian Teknik Pemesinan di SMK Negeri 6 Malang. Skripsi, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Malang. Pembimbing: (I) Dr. H. Dwi Agus Sudjimat, S.T., M.Pd, (II) Dr. H. Purnomo, S.T., M.Pd. Kata Kunci: implementasi, pendekatan saintifik, SMK, pemesinan Implementasi kurikulum baru sangat menonjolkan pendekatan saintifik dengan pembelajaran berpusat pada  peserta didik. Pendekatan saintifik/ilmiah merupakan proses pembelajaran yang menggunakan proses berpikir ilmiah. Pendekatan ilmiah dapat dijadikan sebagaijembatan untuk perkembangan dan pengembangan sikap, keterampilan dan pengetahuan peserta didik. Kemendikbud (2013) memberikan konsepsi bahwa pendekatan ilmiah (scientific approach) dalam pembelajaran mencakup komponen: mengamati, menanya, mencoba, mengolah, menyajikan, menyimpulkan, dan mencipta. Pendekatan saintifik dilaksanakan diseluruh jenjang pendidikan salah satunya Sekolah Menengah Kejuruan (SMK). Pendekatan saintifik merupakan pendekatan pembelajaran yang baru dilaksanakan dalam pembelajaran di SMK. Berangkat dari paradigma diatas diperlukan penelitian yang menggambarkan perencanaan, pelaksanaan, evaluasi, serta kendala implementasi pendekatan saintifik dalam pembelajaran di SMK khususnya di SMK Negeri 6 Malang Paket Keahlian Teknik Pemesinan. Penelitian ini menggunakan pendekatan kualitatif dengan jenis penelitian deskritif. Penelitian dilaksanakan di SMK Negeri 6 Malang pada Paket Keahlian Teknik Pemesinan. Pengumpulan data dalam penelitian ini meliputi wawancara, dokumentasi, serta observasi. Dari hasil pengamatan dan wawancara serta dokumentasi pada dasarnya dalam penelitian ini dapat diketahui dan digambarkan bahwa implementasi pendekatan saintifik sesuai dalam pembelajaran paket keahlian teknik pemesinan. Hasil penelitian tentang pendekatan saintifik dalam pembelajaran Paket Keahlian Teknik Pemesinan di SMK Negeri 6 Malang diperoleh: (1) perencanaan pendekatan saintifik dalam pembelajaran dengan membuat RPP dari silabus yang ditentukan Kemendiknas, (2) pendekatan saintifik sudah dilaksanakan dalam pembelajaran di SMK Negeri 6 Malang Paket Keahlian teknik pemesinan namun belum berurutan,(3) evaluasi pendekatan saintifik dilaksanakan secara formal dan non-formal, dan (4) kendala pendekatan saintifik terdapat pada proses perencanaan, yaitu: sarana-prasarana kurang lengkap pemahaman siswa belum kuat, proses mengubah mindset guru, kendala pada pelaksanaan, yaitu: kemampuan akademik siswa berbeda dan guru tidak menguasai ilmu teknologi, serta kendala pada evaluasi adalah dokumen evaluasi yang kurang lengkap.

NILAI KEARIFAN LOKAL RUMAH TRADISIONAL JAWA

Java has the values that can be taken in relation to the value of the benefits of ethics and aesthetics. One farm of those values are joglo art that have the local knowledge of Javanese culture. Model approach in this research is leading to a descriptive qualitative ethnographic, in which the empirical reality a result, demanding researchers go directly to the location of the study, to be able to live up to their tradition, and the symptoms of everyday life that is full of social phenomena local culture. This research firms a single case study stuck. In the context of this case study, a traditional Javanese home visits as a sub unit of analysis, but its existence still viewed/reviewed as a place that is part of the social system of the larger society around Surakarta. Java house building structure is one that reflects the composition of space like typical building pendhapa, pringgitan, dalem, kitchen, or gadri gandhok. The relation between this structure is a structure which is strongly influenced by the manifestation process mythology and cosmology Java). This means that the traditional Javanese house is not just a place to shelter (practical function), but also understood as a manifestation of the ideals and outlook on life or a symbolic function. In this case the traditional Javanese houses are not only placed as an autonomous element, a separate stand alone, but being seen in context, particularly relevant to the context of allied Javanese cosmology that underlie the view that the Javanese philosophy of Iife

NILAI KEARIFAN LOKAL RUMAH TRADISIONAL JAWA

Java has the values that can be taken in relation to the value of the benefits of ethics and aesthetics. One farm of those values are joglo art that have the local knowledge of Javanese culture. Model approach in this research is leading to a descriptive qualitative ethnographic, in which the empirical reality a result, demanding researchers go directly to the location of the study, to be able to live up to their tradition, and the symptoms of everyday life that is full of social phenomena local culture. This research firms a single case study stuck. In the context of this case study, a traditional Javanese home visits as a sub unit of analysis, but its existence still viewed/reviewed as a place that is part of the social system of the larger society around Surakarta. Java house building structure is one that reflects the composition of space like typical building pendhapa, pringgitan, dalem, kitchen, or gadri gandhok. The relation between this structure is a structure which is strongly influenced by the manifestation process mythology and cosmology Java). This means that the traditional Javanese house is not just a place to shelter (practical function), but also understood as a manifestation of the ideals and outlook on life or a symbolic function. In this case the traditional Javanese houses are not only placed as an autonomous element, a separate stand alone, but being seen in context, particularly relevant to the context of allied Javanese cosmology that underlie the view that the Javanese philosophy of Iife

Stress Corrosion Cracking Analysis of the ER70S Wire and SS400 Steel Plate Joints

The susceptibility of weld joints to the Stress Corrosion Cracking (SCC) load alarmed the researchers since pipeline blow-out which were initiated in the area closed to the weld joints. This article is evaluating the SCC resilience of the ER70S wire filler metal to the SS400 plate. The Capacitive Discharge Welding (CDW) with varied angle of the filler metal as an independent variable, whilst the other parameters were kept constant. The joint, then exposed to the SCC load, i.e., dipped in the 1M HCl solution with varied external tensile load to obtain the dependent variable: time to failure (time to brake). The results show that, generally, a sharper wire tip provides higher SCC resilience accept what was shown by the 30? specimen. With the sharper wire tip, the higher volume of weld nugget is provided which guarantee the enough number of weld metal. However, the impact phenomenon in the CDW process splashed this too much nugget beyond the formed joint which is proven by the many spatters in the weld joint. This thrown out nugget substance in turn decrease the intended nugget volume to form the joint. The results show the 60? wire tip angle provide the joint with the highest SCC resilience, indicated by the longest time to brake when loaded with an equal external loa

Proceedings of the 3rd International Conference on Community Engagement and Education for Sustainable Development

This proceeding contains articles on the various ideas of the academic community presented at The 3rd International Conference on Community Engagement and Education for Sustainable Development (ICCEESD 2022) organized by the Universitas Gadjah Mada, Indonesia on 7th-8th December 2022.  ICCEESD is a biannual forum for sharing, benchmarking, and discussing HEI’s activities in developing Education for Sustainable Development towards community engagement. Education for Sustainability as a teaching strategy for resolving community challenges through formal, informal, or non-formal education is expected to benefit from various community service best practices by academics, researchers, and students. The 3rd ICCEESD has “Strengthening Education for Sustainability Towards Better Community Engagement” as its theme this year. It is expected that the 3rd ICCEESD will provide a forum for the presenters and participants to exchange best practices, policies, and conceptual implementation of Education for Sustainability towards better community engagement and explore ideas to address community needs.  Conference Title: 3rd International Conference on Community Engagement and Education for Sustainable DevelopmentConference Theme: Strengthening Education for Sustainability Towards Better Community EngagementConference Acronyms: ICCEESD 2022Conference Date: 7th-8th December 2022Conference Location: Grand Rohan Jogja Yogyakarta, IndonesiaConference Organizer: Universitas Gadjah Mada, Indonesi