?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=ANALISIS+PERAMBATAN+RETAK+FATIK+MAGNESIUM+AZ31B&rft.creator=ALDITA%2C++UMAR+FAJRI&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Magnesium+AZ31B+dipilih+karena+merupakan+material+yang+banyak+digunakan%0D%0Adalam+industri+otomotif+dan+biomaterial+karena+sifat+mekaniknya+yang+unggul%0D%0Aseperti+ringan%2C+rasio+kekuatan+terhadap+berat+yang+tinggi%2C+dan+kekakuan+spesifik%0D%0Ayang+tinggi.+Tujuan+dari+penelitian+ini+adalah+untuk+mengetahui+karakteristik%0D%0Aperambatan+retak+lelah+material+Magnesium+AZ31B.+Uji+tarik+(ASTM+8)+dan+uji%0D%0Aperambatan+retak+lelah+(ASTM+E647)+menggunakan+benda+uji+Compact+Tension%0D%0A(CT).+Parameter+yang+digunakan+pada+pengujian+adalah+Pmax+%3D+1+kN%2C+Pmin+%3D+0%2C1%0D%0AkN%2C+R%3D0%2C1%2C+%CF%83yield+%3D+188.407+MPa+dan+f+%3D+10+Hz.+Pengukuran+panjang+retak%0D%0Amenggunakan+metode+kepatuhan+dan+data+panjang+retak+serta+jumlah+siklus%0D%0Adianalisis+menggunakan+metode+polinomial+inkremental+untuk+mengetahui+laju%0D%0Aperambatan+retak+lelah+(da%2FdN)+dan+faktor+intensitas+tegangan+(%CE%94K).+Plot+data%0D%0Ada%2FdN+vs+%CE%94K+dilakukan+untuk+menentukan+koefisien+persamaan+Paris+pada+daerah%0D%0Aperambatan+retakan+tahap+II+yang+stabil.+Nilai+konstanta+m+%3D+3%2C067+dan+nilai%0D%0Akonstanta+C+%3D+3%2C747x10-10.+Pengamatan+SEM+pada+permukaan+rekahan%0D%0Amenunjukkan+pola+rekahan+intergranular.+Selain+itu%2C+permukaan+rekahan%0D%0Amenunjukkan+lurik%2C+retakan+sekunder%2C+belahan+dan+rongga.%0D%0A%0D%0AKata+Kunci+%3A+Magnesium+AZ31B%2C+Perambatan+retak+fatik%2C+Fraktografi.%0D%0A%0D%0A%0D%0AMagnesium+AZ31B+was+chosen+because+it+is+a+material+widely+used+in+the%0D%0Aautomotive+and+biomaterial+industries+due+to+its+superior+mechanical+properties%0D%0Asuch+as+light+weight%2C+high+strength-to-weight+ratio%2C+and+high+specific+stiffness.+The%0D%0Apurpose+of+this+study+is+to+determine+the+fatigue+crack+propagation+characteristics%0D%0Aof+AZ31B+Magnesium+material.+The+tensile+test+(ASTM+8)+and+fatigue+crack%0D%0Apropagation+test+(ASTM+E647)+used+Compact+Tension+(CT)+specimens.+The%0D%0Aparameters+used+during+the+test+were+Pmax+%3D+1+kN%2C+Pmin+%3D+0%2C1+kN%2C+R%3D0%2C1%2C+%CF%83yield%0D%0A%3D+188.407+MPa+and+f+%3D+10+Hz.+Crack+length+measurements+using+the+compliance%0D%0Amethod+and+data+on+crack+length+and+number+of+cycles+were+analyzed+using+the%0D%0Aincremental+polynomial+method+to+determine+the+fatigue+crack+propagation+rate%0D%0A(da%2FdN)+and+stress+intensity+factor+(%CE%94K).+A+plot+of+da%2FdN+vs+%CE%94K+data+was%0D%0Aperformed+to+determine+the+coefficients+of+the+Paris+equation+in+the+stable-stage%0D%0AII+crack+propagation+region.+The+constant+value+m+%3D+3%2C067+and+the+constant+value%0D%0AC+%3D+3%2C747x10-10.+SEM+observation+of+the+fracture+surface+showed+an%0D%0Aintergranular+fracture+pattern.+In+addition%2C+the+fracture+surface+showed+striations%2C%0D%0Asecondary+cracks%2C+cleavage+and+voids.%0D%0A%0D%0AKeywords+%3A+Magnesium+AZ31B%2C+Fatigue+crack+propagation%2C+Fractografi.%0D%0A&rft.publisher=FAKULTAS+TEKNIK&rft.date=2024-08-01&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82343%2F1%2Fabstrak%2520-%2520Aldita%2520umar%2520Fajri.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82343%2F3%2Fskripsi%2520aldita%2520umar%2520fajri%2520full%2520tanpa%2520lampiran%2520-%2520Aldita%2520umar%2520Fajri.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82343%2F2%2Fskripsi%2520aldita%2520umar%2520fajri%2520full%2520tanpa%2520pembahasan%2520dan%2520lampiran%2520-%2520Aldita%2520umar%2520Fajri.pdf&rft.identifier=++ALDITA%2C+UMAR+FAJRI++(2024)+ANALISIS+PERAMBATAN+RETAK+FATIK+MAGNESIUM+AZ31B.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F82343%2F