Pengaruh jumlah lapisan penguat serat karbon dan reduksi 42% ketebalan pada matriks aluminium alloy 7075 - T6 melalui pencanaian dingin terhadap ketahanan balistik komposit laminat = The effect of the number of carbon fiber reinforcing layers and 42% thickness reduction in the 7075 - T6 aluminum alloy matrix through cold rolling on the ballistic resistance of laminate composite.