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Masyhudi
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Pengaruh Waktu Tempering terhadap Karakter Baja s45c Pasca Quenching pada 950oc dan Tempering 500 C Ahmad Zayadi; Sungkono; Masyhudi; Ekky Setyawan T
Jurnal Teknologi Kedirgantaraan Vol 7 No 1 (2022): Jurnal Teknologi Kedirgantaraan
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jtk.v7i1.53

Abstract

Baja merupakan salah satu bahan struktur yang berfungsi sebagai wadah secara fisik, memberikan kekuatan mekanik, dan struktur penyangga untuk berbagai komponen industri nuklir, bahan tersebut membutuhkan sifat mekanik yang tinggi. Baja S45C memiliki kekuatan mekanik yang sedang sehingga dapat ditingkatkan sifat mekaniknya dengan perlakuan panas. Penelitian ini mempunyai tujuan untuk mendapatkan karakter mekanik, mikrostruktur, kekerasan, dan komposisi kimia pada Baja S45C. Metode yang digunakan adalah komposisi kimia dengan spark spectrometer, pengujian Tarik menggunakan mesin uji Tarik 50 KN, pengamatan mikrostruktur menggunakan mikroskop optik, dan kekerasan dengan vickers microhardness tester. Hasil penelitian menunjukkan bahwa komposisi kimia sampel pengujian adalah baja S45C, kekuatan tarik baja S45C yang menggunakan sampel tarik pasca perlakuan panas austenisasi, quenching media oli dan tempering 500 OC waktu penahanan 60 menit pendinginan suhu tungku lebih tinggi UTS (Ultimate tensile strength) dengan nilai UTS 805,12 (N/mm2), kekuatan luluh (Y)= 619,14 (N/mm2), dan regangan (e) = 15,00 %. dibandingkan sampel tanpa perlakuan panas dengan nilai (UTS) = 331,9 (N/mm2), kekuatan luluh (Y) = 267,27 (N/mm2) , dan regangan (e) = 20,08 %. Regangan baja S45C sampel tarik standar dan silinder pasca perlakuan panas lebih rendah dibandingkan sampel tanpa perlakuan panas. Mikrostruktur baja S45C tanpa perlakuan panas mempunyai fasa ferit dan perlit, sedangkan pasca quenching dan tempering adalah fasa martemper dan ferit. Semakin lama waktu penahanan pada proses tempering baja S45C, maka akan semakin rendah nilai kekerasan yang didapat. Proses perlakuan panas yang diterapkan pada sampel tarik baja S45C akan meningkatkan ketangguhan baja S45C yang ditandai dengan kenaikan kekuatan tarik dan keuletannya. Kekerasan logam dasar lebih rendah dibandingkan pada daerah patahan yang disebabkan adanya fenomena pengerasan regangan di daerah patahan selama uji tarik berlangsung.
Analisis Kerusakan Kepala Silinder Blok Mesin Pada Kendaraan Jenis Minibus Kapasitas 1500 CC Ahmad Zayadi; Sungkono; Masyhudi
Jurnal Teknologi Kedirgantaraan Vol 8 No 2 (2023): Jurnal Teknologi Kedirgantaraan
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jtk.v8i2.79

Abstract

Four-wheeled vehicles are one of the commonly used modes of transportation. The vehicle engine has a cylinder head to place the valves and cooling mantle. Damage to the cylinder head will disrupt the engine's working system for a long time. The damaged  will take a long time for the repair process. The cylinder head is usually damaged at a milage of 80,000 km. The damage experienced by the cylinder head is the emergence of a rough sound in the engine, the mixing of cooling water into the combustion chamber and the temperature rises quickly, in this study a study will be conducted on the damage that occurs to the cylinder head. Based on the results of macrostructure testing, corrosion occurs due to engine cooling fluid, besides that there is a deposit that is very strong and corrosive to the cylinder head on the engine block, microstructure testing shows the presence of (black) deposits which are thought to affect the corrosion process, dendrite grains and rods in the microstructure do not change grain size. Based on the hardness test results show the hardness value of the damaged surface of 102.22 HV and the hardness value of the undamaged surface of 102 HV based on the damage to the engine block cylinder head is not caused by material deformation due to mechanical and thermal loads. The results of the chemical composition test of the cylinder head that was damaged decreased Al 1.1%, Si 0.11%, Cu 0.37, Fe 0.088% and Mg 0.081% and the decrease in the chemical composition of the constituent elements of the material was caused by the interaction of water with the surface of the cylinder head which was characterized by the formation of oxides of Al, Si, Cu, Fe, and Mg. Based on the test results, cylinder head damage is more due to lack of maintenance of the engine block.
MATA AIR JOLOTUNDO (Studi Tentang Pandangan Masyarakat Muslim Terhadap Kekhasiatan Mata Air Jolotundo Desa Seloliman Mojokerto) Laila Wardatin; Masyhudi
Qurthuba: The Journal of History and Islamic Civilization Vol. 4 No. 1 (2020): September
Publisher : Program Studi Sejarah Peradaban Islam Fakultas Adab dan Humaniora UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15642/qurthuba.2020.4.1.23-35

Abstract

Abstract: The focus of this article examines the public's view of the Jolotundo spring. The problems discussed in this article are as follows: 1). How is the monograph of Seloliman village, Trawas district, Mojokerto district. 2). How is the existence of the Jolotundo spring 3). What is the public's view of the Jolotundo spring. Answers to the questions above the author answers using ethnographic methods. Researchers also use the theory of cognitive anthropology which was widely developed by Ward H. Goodenough. This study concludes that: 1). Seloliman Village has a predominantly Muslim population, in which there is a Jolotundo spring. 2). Jolotundo spring is a holy spring (amartha). From the existence of the Jolotundo spring which is spread among the people in general, namely as a medicine to cure diseases. 3). Nahdatul Ulama figures allow that if anyone believes that the Jolotundo spring is holy and can be used to cure all kinds of ailments, however, the spring must be believed to be an intermediary medium for healing diseases from Allah. Keywords: water springs, Muslim, medicine, fatwa
MENJELANG MASUKNYA ISLAM DI UJUNG TIMUR PULAU JAWA Masyhudi
Berkala Arkeologi Vol. 27 No. 1 (2007)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v27i1.941

Abstract

Very little archaeological data regarding the development of Islam in the Banyuwangi area is currently available. From this minimal archaeological data, it shows that there is no time conformity with the historical chronology of the development of Islam in the Banyuwangi Regency area. Related to this, academic research or studies in the field of archeology are still needed to support or find the truth of the history of the development of Islam in the Banyuwangi area, and in general for the purpose of forming and strengthening national identity.
SITUS CANDI SAMBISARI YANG PERNAH TERPENDAM Masyhudi
Berkala Arkeologi Vol. 25 No. 1 (2005)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v25i1.908

Abstract

Geomorphologically, Sambisari Temple site is located on the alluvial plain at the foot of Mount Merapi, so that the land is fertile, it is easy to get water and the land is suitable for living and farming. This reason is very possible for the construction of temples. However, because then the area where the site was covered by volcanic ash as a result of the eruption of Mount Merapi which was very powerful due to the combination of the three tectonic, gravitational and volcanic forces that caused the volcanic cone of Merapi to flow sunken hyperbolic faults. This results in the level of soil fertility around the Sambisari Temple Site decreasing and even becoming damaged, because based on the soil material the sediment comes from the main material of lava deposits and fluvial deposits resulting from cleavage of pyroclastic materials from the eruption of Merapi Volcano in the form of boulder, gravel, sand, and dust. While the development of the soil around the Sambisari Site is still in the initial stage which is a type of horizon regosol soil and this soil has not experienced horizon differentiation, so that the soil profile is homogeneous. Such soil properties can be observed through the texture of dusty sand to gravel dust.
CANDI SOJIWAN DALAM PEMUGARAN Masyhudi
Berkala Arkeologi Vol. 25 No. 1 (2005)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v25i1.915

Abstract

The restoration of Sojiwan Temple is still in the early stages of implementation, namely up to the stage of installing the foundation or the foot of the temple. In several other parts, including the installation of the veranda floor, the installation of the body and roof of the temple, and the installation of the temple stairs have not been carried out. Nevertheless, the restoration of Sojiwan Temple will take place in accordance with the activity plan, as has been prepared during the restoration preparation stage (pre-restoration). Because the restoration implementation activities will continue, it is necessary to have a partnership with several related agencies or institutions, especially in terms of human resource needs who have expertise in certain fields, so that the smooth implementation of the restoration will show results in accordance with the expectations of all parties
PEMBERDAYAAN MASYARAKAT DALAM PELESTARIAN DAN PEMANFAATAN SUMBERDAYA BUDAYA (STUDI KASUS DI SITUS CANDI MORANGAN) Masyhudi
Berkala Arkeologi Vol. 24 No. 1 (2004)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v24i1.898

Abstract

Given the limited number of cultural resources (finite), non-renewable, non-movable, and fragile, the use of cultural resources must be oriented towards conservation. Therefore, in an effort to utilize cultural resources, it should be used with care. Then in terms of the development of cultural assets, we must also look at the value of various interests, so that the various conflicts of interest that exist can be suppressed as far as possible so that there is no attempt to defeat each other, but mutually beneficial.
PERDAGANGAN DAN MISTISISME DALAM ISLAMISASI DI SUMATERA DAN JAWA Masyhudi
Berkala Arkeologi Vol. 23 No. 2 (2003)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v23i2.877

Abstract

The trade relations between Europeans and the Middle East, which have colored the trade map before the Islamic era, show that trade relations between Europe and Asia have been going on since before the times of Jesus Christ. Then after the collapse of the domination of India and China, due to the conquest of northern India which then spread to the South and the invasion of China by Islamic armies in the Middle East, it appeared that a wave of Arabs began to form colonies for traders. The trade and political relations between China and Persia, China with Srivijaya, India with Srivijaya and India with China were relations that had lasted for centuries. This kind of relationship cannot just be erased. Therefore, when the teachings of Muhammad (Islam) became established in the Middle East and came to power in northern India, the flow of international trade was intensified, as did the teachings of Islam itself.
ISLAM DAN SINKRETISME DI JAWA Masyhudi
Berkala Arkeologi Vol. 23 No. 1 (2003)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v23i1.863

Abstract

The strategy adopted by Islamic propagators in the northern coastal areas of Java is different from the strategy applied in several areas in the interior of Java. Their trading strategy is the dominant step, besides being carried out by education, marriage and adopting local arts with loads included with Islamic contents. However, in the following period the dominant strategy adopted by Islamic propagation figures in several hinterland areas of Java was through education with institutions such as Islamic boarding schools and tarekat organizations which were the actualization of the teachings of Sufism. However, there has been a syncretization process that focuses on the cognitive and behavioral aspects of Javanese society, as a result of the existence of two cultures (pre-Islamic and Islamic) that touch each other, then they are processed in such a way that there is no conflict. And in the end Islam was accepted by most Javanese people.
PERANAN TASAWWUF DALAM SOSIALISASI ISLAM DI INDONESIA Masyhudi
Berkala Arkeologi Vol. 21 No. 1 (2001)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30883/jba.v21i1.834

Abstract

Of the many literary works that tend to contain mystical teachings or tasawwuf, it shows that Islam and its Sufism have had an appeal among Muslim literati in the past. Not only because of its relevance to humans, but also because of its aesthetic view that is more satisfying, compared to the aesthetic view of Western humanists, because for Islam, the aesthetic view of beauty is a natural grace or gift from God. Beauty is a part of God's nature which has spiritual value and liberation from material life, so that in Islam, beauty is a proof of divinity. Thus it seems increasingly clear that in Indonesia, tasawwuf plays an important role in the socialization process of Islam.
Co-Authors Ahmad Zayadi Deni A Ekky Setyawan T Kis Yoga Utomo Laila Wardatin Laila Wardatin Rahma Amilia Salsabila Sungkono