?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=ANALISIS+PENGARUH+KEKASARAN+PERMUKAAN+TERHADAP+KETAHANAN+FATIGUE+BAJA+AISI+1045+DENGAN+PENGUJIAN+ROTARY+BENDING&rft.creator=Roy+Ronal+Manik%2C+0815021015&rft.subject=Mesin+(General).+Mesin+Sipil+(General)&rft.subject=Teknik+mesin+dan+mesin&rft.description=ABSTRAK%0D%0A%0D%0ABaja+merupakan+material+yang+banyak+digunakan+dalam+dunia+industri.+Salah+satu+jenis+baja+yang+banyak+digunakan++yaitu+baja+AISI+1045+sebagai+bahan+pembuat+poros+untuk+komponen+mesin.+Pada+penggunaannya%2C+poros+beroperasi+menerima+beban+dinamik+dalam+waktu+yang+lama%2C+sehingga+rentan+mengalami+kegagalan+saat+digunakan+akibat+mengalami+kegagalan+lelah.+kekasaran+permukaan+suatu++komponen+mempengaruhi+kekuatan+lelah+(fatique)+komponen+tersebut+karena+semakin+kasar+permukaan+suatu+benda+atau+komponen+mengakibatkan+mudah+timbulnya+awal+retak+yang+berujung+pada+perpatahan+yang+mengakibatkan+umur+pakai+benda+atau+komponen+tersebut+menjadi+pendek.+%0D%0AUntuk+mengetahui+nilai+ketahanan+lelah+baja+AISI+1045+yang+dipengaruhi+kekasaran+permukaannya+maka++dapat+dilakukan+dengan+melakukan+pengujian+ketahanan+lelah+menggunakan+alat+rotary+bending.++Ada+pun+metode+pengujian+yang+dilakukan+adalah+dengan+memberikan+variasi+pembebanan+sebesar+20%25%2C+30%25%2C+40%25%2C+50%25%2C+60%25++dan+70%25++dari+nilai+tegangan+tarik+maksimum+baja+tersebut%2C+serta+melakukan+pengamatan+makroskopik+tehadap+pola+perpatahan++yang+terjadi+pada+spesimen+pengujian.+Hasil+pengujian+menunjukkan+bahwa+nilai+ketahanan+lelah+maksimum+yang+mampu+dicapai+adalah+829.080+siklus+untuk+kekasaran+permukaan+0%2C5%C2%B5m+-+1%C2%B5m+pada+pembebanan+20%25+dan+terus+menurun+terhadap+kekasaran+yang+semakin+meningkat.%0D%0AKata+Kunci+%3AUji+Fatik%2C+Rotary+Bending%2C+Baja+Karbon+Sedang+AISI+1045%0D%0A%0D%0A%0D%0AABSTRACT%0D%0ASteel+is+a+material+that+is+widely+used+in+the+industrial+world.+One+of+the+widely+used+type+of+steel+is+AISI+1045+steel+as+the+material+of+the+shaft+for+the+engine+components+maker.+On+its+use%2C+the+axis+of+operation+receive+dynamic+load+in+a+long+time%2C+so+that+the+vulnerable+experienced+a+failure+when+used+due+to+experiencing+fatigue+failure.+Surface+roughness+of+a+component+affects+the+fatigue+strength+(fatigue)+because+the+rough+surface+of+an+object+or+component+resulting+in+easy+early+onset+of+crack+that+led+to+the+fracture+resulting+component+service+life+becomes+shorter.%0D%0ATo+find+out+the+fatigue+strength+value+of+AISI+1045+steel+which+affected+the+surface+roughness%2C+can+be+done+by+performing+testing+using+the+rotary+bending+testing+machine.+As+for+the+testing+method+is+done+by+giving+the+variation+of+load+by+20%25%2C+30%25%2C+40%25%2C+50%25+%2C60+and+70%25+of+the+ultimate+tensile+strength+value%2C+as+well+as+do+macroscopic+observations+by+taking+action+against+the+pattern+of+the+fracture+that+occurs+in+the+test+specimens.+The+results+show+that+the+value+of+the+maximum+fatigue+resistance+that+can+be+achieved+is+829+080+cycles+for+surface+roughness+0%2C5%CE%BCm+-+1%CE%BCm+at+20%25+loading+and+continues+to+decline+against+the+increasing+roughness.%0D%0A&rft.publisher=Fakultas+Teknik&rft.date=2015-02-06&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F2%2FABSTRACT.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F3%2FCOVER%2520DALAM.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F10%2FLEMBAR%2520PERSETUJUAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F14%2FLEMBAR%2520PENGESAHAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F13%2FLEMBAR%2520PERNYATAAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F4%2FRIWAYAT%2520HIDUP.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F5%2FPERSEMBAHAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F6%2FMOTTO.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F8%2FSANWACANA.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F7%2FDAFTAR%2520ISI.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F9%2FDAFTAR%2520TABEL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F12%2FDAFTAR%2520GAMBAR.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F11%2FDAFTAR%2520LAMPIRAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F15%2FBAB%2520I.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F16%2FBAB%2520II.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F17%2FBAB%2520III.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F7496%2F18%2FBab%2520IV.pdf&rft.format=text&rft.identifier=http%3A%2F%2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