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Original publisher: [Washington, D.C.] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989. OCLC Number: (OCoLC)59759991 Excerpt: ... 100 _ J. J.l., . I, . J., . LI 60F-I................... The fracture behavior observed from the stress-rupture tests ( a ) of W / Cu composites indicated that the stress redistributions postulated during quasi-second-stage and third-stage creep were valid. Unreinforced copper had a brittle stress-rupture ( b ) failure with a very small reduction in area and with a great deal of intercrystalline cracking at the fracture edge. This brittle behavior is typical of materials tested at a very high. OFI II, l, hJ I, l, hhl _llIl, ' I_I ( c ) fraction of their melting points. IO0 200 RUPTURE 6OF I I tl I, Iih. I illhl I iIIJlhJ _0 TIME, ( d ) HR 1200--0 I 100 E-160 [ ] 10 601_ " I I I I I, l, hl h0 0 100 ( e ) V 1000 100 60_-I, I, I, I, _IQiI-NI_ ' _--¢ _ I I llltll_ 120 40 800--( f ) 100 40 I, JlliIiI I, _ _ 80 ( O ) u_ 400--' ! FIc_I l, , l, , l, i I, _, , l ', i_, , , l ' _ ' ( h ) 60 ( a ) ¢. I I I I O_ 20 I hi I, lIhhJ I I llldlJ ( i ) 200 60 1200-20 I IIl ( _d. i, i [ hlll_l Illlll_ i Illllh ] ll ( i ) 160 60 20 I I I, I, bl I " J_h !: ! ! '. !. !: !: ! " _.. o-, .:;, ; J ( k ) 120 800--6 21_1 Illl, lll I Ill * 1 1 t0 100 1000 ( I ) 80 RUPTURE TIRE, HR ( a ) Stress, 690 MPa ( 100 000 psi ). 400--( b ) Stress, 655 MPa ( 95 000 psi ). ( c ) Stress, 621 MPa ( 90 000 psi ). 40 ( d ) Stress, 552 MPa ( 80 000 psi ). ( e ) Stress, 517 MPa ( 75 000 psi ). ( f ) Stress, 483 MPa ( 70 000 psi ). ( b ) ( g ) Stress, 448 MPa ( 65 000 psi ). I o-I I I ( h ) Stress, 414 MPa ( 60 000 psi ). 0 20 40 60 80 100 ( i ) Stress, 345 MPa ( 50 000 psi ). FIBER CONTENT, VOL " L ( i ) Stress, 276 MPa ( 40 000 psi ). ( k ) Stress, 207 MPa ( 30 000 psi ). ( a ) Test temperature, 922 K ( 1200 * F ). ( 1 ) Stress, 34.5 MPa ( 5000 psi ). ( b ) Test temperature, 1089 K ( 1500 * F ). Figure 24.--Fiber co
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Tungsten fiber reinforced copper matrix composites: a review
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