?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=KARAKTERISTIK+PERAMBATAN+RETAK+FATIK+PIPA+BAJA+TYPE%0D%0A%0D%0AAPI+5L+PSL+-1+GRADE+B%0D%0A&rft.creator=TRI+%2C+KUSUMA+WARDANI&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Pipa+baja+API+5L+Grade+B+merupakan+pipa+yang+digunakan+dalam%0D%0Atransportasi+minyak+bumi+dan+gas+alam.+Tujuan+dari+penelitian+ini+adalah%0D%0Auntuk+mengetahui+karakteristik+perambatan+retak+fatik+pada+material+pipa%0D%0Abaja+API+5L-B.+Uji+tarik+(ASTM+8)+dan+uji+perambatan+retak+fatik+(ASTM%0D%0AE647)+menggunakan+spesimen+Compact+Tension+(CT).+Parameter+pengujian%0D%0Ayang+digunakan+dalam+penelitian+ini+yaitu+Pmax+%3D+3%2C566+kN%2C+Pmin+%3D+0%2C357+kN%2C%0D%0A%CF%83yield+%3D+399.251+MPa+dan+f+%3D+10+Hz.+Pengukuran+panjang+retak%0D%0Amenggunakan+metode+compliance+serta+data+panjang+retak+dan+jumlah+siklus%0D%0Adianalisis+menggunakan+metode+polynomial+incremental+untuk+menentukan%0D%0Alaju+perambatan+retak+fatik+(da%2FdN)+dan+faktor+intensitas+tegangan+(%CE%94K).%0D%0APlot+data+da%2FdN+vs+%CE%94K+dilakukan+untuk+menentukan+koefisien+persamaan%0D%0AParis+pada+daerah+perambatan+retak+stabil-stage+II.+Nilai+konstanta+m+%3D%0D%0A3%2C607+dan+nilai+konstanta+C+%3D+1%2C176x10-12%0D%0A%0D%0A.+Pengamatan+mikrostruktur%0D%0Amaterial+menggunakan+mikroskop+optik+menunjukkan+fasa+ferit+dan+perlit.%0D%0APengamatan+SEM+pada+permukaan+patahan+menunjukkan+pola+patahan%0D%0Aintergranular.+Selain+itu%2C+permukaan+patahan+menunjukkan+adanya+garis%0D%0Astriasi%2C+secondary+crack+dan+voids.%0D%0A%0D%0AKata+Kunci+%3A+Pipa+baja+API+5L+grade+B%2C+Perambatan+retak+fatik%2C%0D%0A%0D%0AMikrostruktur%2C+Fraktografi%0D%0A%0D%0Aiv%0D%0A%0D%0AABSTRACT%0D%0A%0D%0AFATIGUE+CRACK+PROPAGATION+CHARACTERISTICS+OF+TYPE+API+5L%0D%0A%0D%0APSL+-1+GRADE+B+STEEL+PIPE%0D%0A%0D%0ABy%0D%0A%0D%0ATRI+KUSUMA+WARDANI%0D%0A%0D%0AAPI+5L+Grade+B+steel+pipe+is+a+pipe+used+in+the+transportation+of+petroleum%0D%0Aand+natural+gas.+The+purpose+of+this+study+is+to+determine+the+characteristics%0D%0Aof+fatigue+crack+propagation+in+API+5L-B+steel+pipe+material.+Tensile+test%0D%0A(ASTM+8)+and+fatigue+crack+propagation+test+(ASTM+E647)+using+Compact%0D%0ATension+(CT)+specimens.+The+parameters+used+during+the+test+were+Pmax+%3D%0D%0A3%2C566+kN%2C+Pmin+%3D+0%2C357+kN%2C+%CF%83yield+%3D+399.251+MPa+and+f+%3D+10+Hz.+Crack%0D%0Alength+measurements+using+the+compliance+method+and+data+on+crack+length%0D%0Aand+number+of+cycles+were+analyzed+using+the+incremental+polynomial%0D%0Amethod+to+determine+the+fatigue+crack+propagation+rate+(da%2FdN)+and+stress%0D%0Aintensity+factor+(%CE%94K).+A+plot+of+da%2FdN+vs+%CE%94K+data+was+performed+to%0D%0Adetermine+the+coefficients+of+the+Paris+equation+in+the+stable-stage+II+crack%0D%0Apropagation+region.+The+constant+value+m+%3D+3%2C607+and+the+constant+value%0D%0AC+%3D+1%2C176x10-12%0D%0A%0D%0A.+Microstructural+observations+of+the+material+using+optical%0D%0Amicroscopy+showed+ferrite+and+pearlite+phases.+SEM+observation+of+the%0D%0Afracture+surface+showed+an+intergranular+fracture+pattern.+In+addition%2C+the%0D%0Afracture+surface+showed+the+presence+of+striation+lines%2C+secondary+cracks%0D%0Aand+voids.%0D%0A%0D%0AKey+words+%3A+API+5L+grade+B+steel+pipe%2C+Fatigue+crack+propagation%2C%0D%0A%0D%0AMicrostructure%2C+Fractograf&rft.publisher=FAKULTAS+TEKNIK&rft.date=2024-05-28&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F83706%2F1%2FABSTRAK%2520-%2520Tri%2520Kusumawardani.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F83706%2F2%2FSKRIPSI%2520FULL%2520-%2520Tri%2520Kusumawardani.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F83706%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN%2520-%2520Tri%2520Kusumawardani.pdf&rft.identifier=++TRI+%2C+KUSUMA+WARDANI++(2024)+KARAKTERISTIK+PERAMBATAN+RETAK+FATIK+PIPA+BAJA+TYPE+API+5L+PSL+-1+GRADE+B.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F83706%2F