Word: armor
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What of Bandung in its high, supposedly impregnable mountains? They were not impregnable. The Japanese, forearmed by long fifth-column study of Java, struck at the crevice in Bandung's natural armor: a rising terrace of plains on the north, where the defending soldiers had no defense except their own insufficient numbers and weapons. Bombed from a ring of captured airdromes, Bandung could have been no Bataan...
First, welding began to replace riveting in ship-and plane-building (TIME. Dec. 15). Now cast steel is replacing forged steel, and in tanks it is replacing both riveted and welded armor plate. Engineers call this technological shift "little short of a revolution...
...Armor. Casting U.S. tank turrets and hulls, heretofore riveted or welded together from steel plate, gets rid of another traditional prejudice against cast steel: that it couldn't successfully be toughened by heating and quenching. About one-third of U.S. tanks are now built of cast armor, and all of them would be, if foundry and machining facilities were adequate...
...advantages of cast armor are that...
...allows a goodly weight saving by eliminating angle-pieces and overlapping necessary for riveting plates together. Unlike welded armor, cast armor has no seams of uncertain toughness. And, unlike both riveted and all-welded armor, cast armor can have rounded corners to deflect glancing shells...