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All Journal Majalah Ilmiah Material, Komponen dan Konstruksi Jurnal Ilmiah Wahana Pendidikan
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PENGARUH PERUBAHAN MIKROSTRUKTUR TERHADAP PERUBAHAN KEKERASAN RADIANT TUBE YANG TELAH BEROPERASI SEJAK 2003 Laili Novita Sari; Sutarjo .
Jurnal Material Komponen dan Konstruksi Vol. 16 No. 1 (2016)
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mkk.v16i1.3289

Abstract

B2TKS - Sub- Analysis of Damage and residual life has done Remaining Life Assessment to the radiant tube on oil and gas companies from 2003 - 2016. In determining the RLA, it was used graph of the Era Technology where the determination is based on the microstructural changes while there are no literature or research which shows the hardness changing of material ASTM A 213 T5 which occurs during the aging process. Therefore it need to make formulation about the changes of spheriodizationto the chages of hardness of radiant tube material ASTM A 213 T5. By knowing a reasonable decrease in hardness to spheriodization, it was expected to detect the abnormal condition or damage earlier. Based on the examination of metallographic and hardness testing ,is was known that the reduction of hardness occur in proportion to the increase ofsperiodization percentage. In spheriodzation changing of Classification A, B, C the decrease of hardness below 0.7 HB / HB0 while classification D until the next classification,reduction of hardness above 0,7HB / HB0.AbstrakB2TKS – Sub Bidang Analisa Kerusakan dan umur sisa telah melakukan Remaining Life Assesment pada radiant tube pada perusahaan minyak dan gas bumi dari tahun 2003 – 2016. Dalam penentuan RLAdigunakan grafik dari Era Teknologi dimana penentuannya berdasarkan perubahan struktur mikro sedangkan untuk perubahan kekerasan material belum ada literatur atau penelitianyang menunjukkan tentang perubahan kekerasan pada material ASTM A 213 T5yang terjadi selama proses penuaan. Karena itu dilakukan perumusanperubahan kekerasan terhadap speriodisasi pada tube radiant material ASTM A 213 T5. Dengan mengetahui penurunan kekerasan yang wajar terhadap speriodisasi diharapkan akan mempermudah pendeteksian awal kondisi abnornal atau kerusakan. Berdasarkan pengamatan metalografi dan uji kekerasan diketahui bahwa penurunan kekerasan terjadi secara proporsional dengan peningkatan prosentase spriodisasi. Klasifikasi A, B, C penurunan kekerasan dibawah 0,7 HB/HB0 sedangkan klasifikasi D sampai berikutnya penurunan kekerasan diatas 0,7HB/HB0.Keywords: hardness, radiant tube, in situ metallography, ASTM A 213 T5
Hubungan Kimpetensi Sosial Guru PAI Dengan Minat Belajar Siswa Kelas IX SMPN 1 Telukjambe Timur Karawang Bibil Muhammad Jibril; Sutarjo .; Lilis Karwati
Jurnal Ilmiah Wahana Pendidikan Vol 8 No 17 (2022): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (236.908 KB) | DOI: 10.5281/zenodo.7069760

Abstract

The teacher is the most vital figure in the world of education. Teachers are professionals whose duties are to educate, teach, guide, direct, assess and evaluate students in early childhood formal education, primary and secondary education (RI Law Number 14 of 2005 concerning Teachers and Lecturers). Professional teachers must have competencies, where the competence of the teacher has 4 kinds of competences. The first is personality competence, pedagogical competence, professional competence and social competence. The Relationship between PAI Teachers' Professional Competence and Learning Interest This study used a quantitative design with a questionnaire questionnaire. The total sample used in this study amounted to 80 class IX students consisting of 3 classes. The PAI Teacher Professional Competence Variable was measured through a questionnaire questionnaire from Variable X using research instruments and the Learning Interest Variable was measured through a questionnaire questionnaire variable Y with 10 items each of each variable. Testing requirements analysis for data normality tests using educational statistical tests in the exel program. Then do the analysis of the Sperman Rank Correlation Summary test. To find out the results of hypothesis testing, it shows that the relationship between the PAI Teacher Professional Competence learning model and student interest in learning. In the Sperman Rank Correlation table, the conclusion is: Hypothesis testing is accepted if the t value ≥ t table. From the results of the above calculations show that t count = 7.5 ≥ t table 1.9916. This means that there is an interaction relationship between PAI Teacher Professional Competence and Student Learning Interests.
Co-Authors Bibil Muhammad Jibril Laili Novita Sari Lilis Karwati