?url_ver=Z39.88-2004&rft_id=1815021053&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+VARIASI+TEMPERATUR+ARTIFICIAL+AGING+PADA+ALUMINIUM+6061+TERHADAP+SIFAT+KEKERASAN+DAN+STRUKTUR+MIKRO&rft.creator=MUHAMMAD+FAJAR+SEPTIAN+%2C+1815021053&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=ABSTRAK%0D%0A%0D%0ATHE+EFFECT+OF+ARTIFICIAL+AGING+TEMPERATURE+VARIATIONS+ON+ALUMINUM+6061+ON+HARDNESS+AND+MICRO+STRUCTURE%0D%0A%0D%0A%0D%0A%0D%0AOleh%3A+Muhammad+Fajar+Septian%0D%0A%0D%0A%0D%0A%0D%0AThis+study+aims+to+determine+the+effect+of+artificial+aging+temperature+on+the+hardness+and+microstructure+of+Al6061.+This+study+used+a+specimen+in+the+form+of+Aluminum+6061+series+which+was+heat+treated+with+a+temperature+of+4500C+for+30+minutes%2C+then+quenched+with+a+cooling+medium+in+the+form+of+water.+Subsequently%2C+they+were+reheated+with+temperature+variations+of+150%C2%B0C%2C+190%C2%B0C+and+230%C2%B0C+with+a+holding+time+of+5+hours.+Then+the+specimen+is+slowly+cooled+to+room+temperature.%0D%0A%0D%0A%0D%0A%0D%0AThe+results+of+the+chemical+composition+test+using+Spectromax+showed+the+percentage+of+Al+was+95.1%25%2C+Mg+was+1.5%25+and+Si+was+1.07%25.+The+results+of+the+hardness+test++using++the+Rockwell++Hardness+Tester+obtained++a++hardness+value+without+heat+treatment+which+has+a+hardness+value+of+24.5+(HRB)%2C+a+hardness+value+after+quenching+of+21.4+(HRB).+The+highest+hardness+value+is+found+in+heating+with+temperature+variations+at+190%C2%B0C+with+a+hardness+value+of+43.1+(HRB)+where+the+hardness+value+at+190%C2%B0C+has+an+increase+of+74.9%25+from+the+hardness+value+of+the+material+without+heat+treatment.+Microstructure+testing+showed+that+the+Al6061+material+after+the+artificial+aging+process+at+a+temperature+of+190%C2%B0C+had+a+higher+number+of+phases+and+the+Al6061+grain+boundaries+tended+to+be+more+dense+and+regular.+This+means+that+the+material+that+has+been+treated+with+artificial+aging+has+precipitated+deposits+or+the+formation+of+a+second+phase+which+causes+the+material+to+be+harder+and+have+better+mechanical+properties.+%0D%0A%0D%0A%0D%0A%0D%0AABSTRAK%0D%0A%0D%0APENGARUH+VARIASI+TEMPERATUR+ARTIFICIAL+AGING+PADA+ALUMINIUM+6061+TERHADAP+SIFAT+KEKERASAN%0D%0ADAN+STRUKTUR+MIKRO%0D%0A%0D%0A%0D%0A%0D%0AOleh%3A+Muhammad+Fajar+Septian%0D%0A%0D%0A%0D%0A%0D%0APenelitian+ini+bertujuan+untuk+mengetahui+pengaruh+temperatur+artificial+aging+terhadap+sifat+kekerasan+dan+struktur+mikro+Al6061.+Penelitian+ini+menggunakan+spesimen+berupa+Aluminium+seri+6061+yang+diberi+perlakuan+panas+dengan+suhu%0D%0A4500C+selama+30+menit%2C+kemudian+di+quenching+dengan+media+pendingin+berupa%0D%0Aair.+Selanjutnya+diberi+perlakuan+panas+kembali+dengan+variasi+temperatur+yakni%0D%0A1500C%2C+1900C+dan+2300C+dengan+holding+time+selama+5+jam.+Kemudian+spesimen%0D%0Adidinginkan+secara+lambat+dengan+suhu+ruangan.%0D%0A%0D%0AHasil+uji+komposisi+kimia+menggunakan+Spectromax+menunjukan+persentase+Al+sebesar++95%2C1%25%2C++Mg++sebesar++1%2C5%25++dan++Si+sebesar++1%2C07%25.++Hasil+uji++kekerasan+menggunakan+Rockwell+Hardness+Tester+didapatkan+nilai+kekerasan+tanpa+perlakuan+panas+yang+memiliki+nilai+kekerasan+sebesar+24%2C5+(HRB)%2C+nilai+kekerasan+setelah+diquenching+sebesar+21%2C4+(HRB).+Nilai+kekerasan+tertinggi+terdapat+pada+pemanasan+dengan+variasi+temperatur+pada+1900C+dengan+nilai+kekerasan+sebesar%0D%0A43%2C1+(HRB)+dimana+nilai+kekerasan+pada+temperatur+1900C+mengalami+peningkatan+sebesar+74%2C9%25+dari+nilai+kekerasan+bahan+tanpa+perlakuan+panas.+Pengujian+struktur%0D%0Amikro+didapatkan+hasil+material+Al6061+setelah+proses+artificial+aging+pada+temperatur+1900+C+memiliki+fase+%CE%B8+dengan+jumlah+yang+lebih+banyak+dan+batas+butir+Al6061+cenderung+lebih+rapat+dan+teratur.+Hal+ini+berarti+bahwa+pada+bahan+yang+mendapat+perlakuan+artificial+aging+terdapat+endapan+presipitat+atau+terbentuknya+fasa+kedua+yang+menjadi+penyebab+bahan+tersebut+lebih+keras+dan+lebih+baik+sifat+mekanisnya.%0D%0A%0D%0A%0D%0AKata+Kunnci%3A+aluminium+6061%2C+artificial+aging%2C+nilai+kekerasan+dan+struktur+mikro.+%0D%0A&rft.publisher=FAKULTAS+TEKNIK&rft.date=2022-08-18&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F65721%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F65721%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F65721%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++MUHAMMAD+FAJAR+SEPTIAN+%2C+1815021053++(2022)+PENGARUH+VARIASI+TEMPERATUR+ARTIFICIAL+AGING+PADA+ALUMINIUM+6061+TERHADAP+SIFAT+KEKERASAN+DAN+STRUKTUR+MIKRO.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F65721%2F