Pub Date : 2017-03-12DOI: 10.14203/METALURGI.V27I3.230
Parikin Parikin, S. Suminta
{"title":"PENGUKURAN PENGARUH TEKANAN PERAH PADA TEGANGAN SISA PADUAN AlSi SQUEEZE CASTING DENGAN TEKNIK DIFRAKSI SINAR-X[Measurements of Pressure Die Effects on The Residual Stresses of Squeeze Casting AlSi Alloys using X-Ray Diffraction Techniques]","authors":"Parikin Parikin, S. Suminta","doi":"10.14203/METALURGI.V27I3.230","DOIUrl":"https://doi.org/10.14203/METALURGI.V27I3.230","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"27 1","pages":"201-212"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44421553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v28i1.244
Andi M. Kadir, D. Priadi, E. S. Siradj, Harkali Setiyono
{"title":"INVESTIGASI EKSPERIMENTAL PERILAKU PROFIL BAJA RINGAN BERPENAMPANG PERSEGI AKIBAT INTERAKSI BEBAN TEKAN MEMUSAT DAN MOMEN LENTUR[Behaviour Experimental Investigation of A Thin-Walled Steel Square Hollow Secton Beam Affected by the Interaction of Concentrated Compressive Load and Bending Moment]","authors":"Andi M. Kadir, D. Priadi, E. S. Siradj, Harkali Setiyono","doi":"10.14203/metalurgi.v28i1.244","DOIUrl":"https://doi.org/10.14203/metalurgi.v28i1.244","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"28 1","pages":"33-48"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48370199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v28i3.260
T. B. Romijarso
{"title":"PERBANDINGAN KEKERASAN DAN KETAHANAN ABRASI PROSES PELAPISAN KROMISASI, BORONISASI DAN VANADISASI PADA BESI COR KELABU[Comparison of Hardness And Abrassion Resistant of Boronizing Vanadizing and Chromizing Coated Gray Cast Iron]","authors":"T. B. Romijarso","doi":"10.14203/metalurgi.v28i3.260","DOIUrl":"https://doi.org/10.14203/metalurgi.v28i3.260","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"28 1","pages":"167-176"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43228667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/METALURGI.V27I3.238
Y. Yunasfi
{"title":"KARAKTERISASI NANOSTRUKTUR KARBON DARI GRAFIT HASIL MILLING[Characterization of Nanostructured Carbon from Graphite as Milling Product]","authors":"Y. Yunasfi","doi":"10.14203/METALURGI.V27I3.238","DOIUrl":"https://doi.org/10.14203/METALURGI.V27I3.238","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"27 1","pages":"279-286"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43880212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v29i3.296
A. Imaduddin, S. Yudanto, B. Siswayanti, Hendrik Hendrik
{"title":"PERGESERAN SUHU KRITIS SUPERKONDUKTOR Bi-Pb-Sr-Ca-Cu-O PADA MEDAN MAGNET TINGGI[The Shift In Critical Temperature Of Bi – Pb – Sr – Ca – Cu – O Superconductors In High Magnetic Field]","authors":"A. Imaduddin, S. Yudanto, B. Siswayanti, Hendrik Hendrik","doi":"10.14203/metalurgi.v29i3.296","DOIUrl":"https://doi.org/10.14203/metalurgi.v29i3.296","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"29 1","pages":"229-234"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49623450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v28i3.262
E. Febriyanti
FAILURE ANALYSIS OF BAFFLE TUBE ON HEAT EXCHANGER SYSTEM IN HEAT TRANSFER PROCESS. This paper discussed about combination between erosion attack and corrosion process as a factor cause of baffle tube leaking in heat exchanger system and given some solution to prevent similar case in future. Heat exchangers transfer heat from a hot fluid to a colder fluid through the combined mechanisms of conduction and forced convection. When the heat exchanger fail, all of the processing system could be affected. In this research the failed baffle tubes of heat exchanger were investigated by failure analysis methods to find the caused of the failure. Several examinations were carried out to the baffle tubes to obtain detailed data for analysis. Examinations are carried out such as visual and fractography, microstructure, hardness testing, chemical composition analysis of baffle tube material, SEM and EDS. Visual examination shows wall thinning which caused by erosion attack and corrosion product at outside surfaces of baffle tube. Additional data obtained from EDS analysis confirm aggresive / corrosive ion such as Sulphur ion (ion S 2) which spreaded around pipe surface investigated. Erosion attack is caused by steam burst from another pipe which have experienced leaking at steam drum. So, it can be concluded that the cause of failure are combination between erosion attack and corrosion process on the outside surfaces of baffle tube.
{"title":"ANALISIS KERUSAKAN PIPA BAFFLE PADA SISTEM HEAT EXCHANGER SUATU PROSES TRANSFER PANAS[Failure Analysis of Baffle Tube on Heat Exchanger System in Heat Transfer Process]","authors":"E. Febriyanti","doi":"10.14203/metalurgi.v28i3.262","DOIUrl":"https://doi.org/10.14203/metalurgi.v28i3.262","url":null,"abstract":"FAILURE ANALYSIS OF BAFFLE TUBE ON HEAT EXCHANGER SYSTEM IN HEAT TRANSFER PROCESS. This paper discussed about combination between erosion attack and corrosion process as a factor cause of baffle tube leaking in heat exchanger system and given some solution to prevent similar case in future. Heat exchangers transfer heat from a hot fluid to a colder fluid through the combined mechanisms of conduction and forced convection. When the heat exchanger fail, all of the processing system could be affected. In this research the failed baffle tubes of heat exchanger were investigated by failure analysis methods to find the caused of the failure. Several examinations were carried out to the baffle tubes to obtain detailed data for analysis. Examinations are carried out such as visual and fractography, microstructure, hardness testing, chemical composition analysis of baffle tube material, SEM and EDS. Visual examination shows wall thinning which caused by erosion attack and corrosion product at outside surfaces of baffle tube. Additional data obtained from EDS analysis confirm aggresive / corrosive ion such as Sulphur ion (ion S 2) which spreaded around pipe surface investigated. Erosion attack is caused by steam burst from another pipe which have experienced leaking at steam drum. So, it can be concluded that the cause of failure are combination between erosion attack and corrosion process on the outside surfaces of baffle tube.","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"28 1","pages":"185-194"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44110366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v28i3.264
R. Subagja, L. Andriyah
{"title":"KINETIKA REAKSI PELARUTAN TEMBAGA DARI MALACHITE KE DALAM LARUTAN ASAM SULFAT[Reaction Kinetics of Copper Dissolution for Malachite into Sulfuric Acid Solution]","authors":"R. Subagja, L. Andriyah","doi":"10.14203/metalurgi.v28i3.264","DOIUrl":"https://doi.org/10.14203/metalurgi.v28i3.264","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"28 1","pages":"203-212"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46464200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v28i1.242
S. Solihin
SINTESIS KALIUM MAGNESIUM POSFAT MELALUI METODA MEKANOKIMIA UNTUK APLIKASI SEBAGAI PUPUK SLOW RELEASE.. Material yang bersifat slow release dapat digunakan sebagai pupuk slow release, yakni jenis baru dimana pelepasan elemennya dapat diturunkan. Salah satu pupuk slow release adalah potassium magnesium phosphate (KMgPO4). Analisa XRD terhadap material ini menunjukan bahwa kemurnian material ini cukup tinggi, hanya fasa KMgPO4 yang dapat dideteksi dalam sampel material ini. Analysis FTIR menunjukan bahwa teknik mekanokimia cukup berhasil untuk mensintesa material in. Analisa DTA menunjukan bahwa material ini stabil dari perubahan temperatur. Analisa morfologi menunjukan bahwa partikel yang tergranulasi memiliki ukuran sekitar 100 mikron. Dibanding dengan pupuk biasa yang nutriennya cepat larut, nutrien yang terlarut dari pupuk jenis slow release dapat diturunkan menjadi sekitar 32-33, 22-24, and 0,1-0,7 %, untuk masing-masing potassium, phosphate and magnesium. Hasil uji leaching menunjukan bahwa material ini dapat digolongkan sebagai material yang bersifat slow release.
{"title":"MECHANOCHEMICAL SYNTHESIS OF POTASSIUM MAGNESIUM PHOSPHATE FOR APPLICATION AS SLOW RELEASE FERTILIZER MATERIAL","authors":"S. Solihin","doi":"10.14203/metalurgi.v28i1.242","DOIUrl":"https://doi.org/10.14203/metalurgi.v28i1.242","url":null,"abstract":"SINTESIS KALIUM MAGNESIUM POSFAT MELALUI METODA MEKANOKIMIA UNTUK APLIKASI SEBAGAI PUPUK SLOW RELEASE.. Material yang bersifat slow release dapat digunakan sebagai pupuk slow release, yakni jenis baru dimana pelepasan elemennya dapat diturunkan. Salah satu pupuk slow release adalah potassium magnesium phosphate (KMgPO4). Analisa XRD terhadap material ini menunjukan bahwa kemurnian material ini cukup tinggi, hanya fasa KMgPO4 yang dapat dideteksi dalam sampel material ini. Analysis FTIR menunjukan bahwa teknik mekanokimia cukup berhasil untuk mensintesa material in. Analisa DTA menunjukan bahwa material ini stabil dari perubahan temperatur. Analisa morfologi menunjukan bahwa partikel yang tergranulasi memiliki ukuran sekitar 100 mikron. Dibanding dengan pupuk biasa yang nutriennya cepat larut, nutrien yang terlarut dari pupuk jenis slow release dapat diturunkan menjadi sekitar 32-33, 22-24, and 0,1-0,7 %, untuk masing-masing potassium, phosphate and magnesium. Hasil uji leaching menunjukan bahwa material ini dapat digolongkan sebagai material yang bersifat slow release.","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"28 1","pages":"19-24"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45577437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-12DOI: 10.14203/metalurgi.v27i3.231
Ronald Nasoetion
{"title":"PENGGUNAAN SISTEM LAPIS LINDUNG JENIS POLYURETAN UNTUK APLIKASI DI DAERAH MARITIM[Using Polyurethane Type for Coating System at Maritim Environment]","authors":"Ronald Nasoetion","doi":"10.14203/metalurgi.v27i3.231","DOIUrl":"https://doi.org/10.14203/metalurgi.v27i3.231","url":null,"abstract":"","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"27 1","pages":"213-224"},"PeriodicalIF":0.6,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47557454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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