POLYCRYSTALLINE rhenium work-hardens rapidly when tested in tension at room temperature (the proportional limit is 26,000 p.s.i. and the ultimate tensile strength is 164,000 p.s.i. 1), and has an ...

Conspicuous by its absence in Part I was any reference to the field-laboratory numerical reliability relationship. This subject was intentionally avoided, since it is complex enough to be discussed ...