|
|
DYNAMIC FRACTURE TOUGHNESS OF ULTRA-STRENGTH STEELS FOR AIRCRAFT USE |
XU Changgan;ZENG Zhongping Beijing University of Aeronautics and Astronautics |
|
Cite this article:
XU Changgan;ZENG Zhongping Beijing University of Aeronautics and Astronautics. DYNAMIC FRACTURE TOUGHNESS OF ULTRA-STRENGTH STEELS FOR AIRCRAFT USE. Acta Metall Sin, 1990, 26(6): 63-67.
|
Abstract The plot of load vs deflection (P--D) for two ultrastrength steels30CrMnSiNi2A and 300M has been examined on the Charpy machine impact tester withdigital memory and microcomputer. A criterion was found to availably represent thedynamic fracture toughness, K_(Ic)~D, of the steels under impact loading. The K_(Ic)~D can becalculated with suggesting that the discontinous shape point of the compliance onthe P--D plot is the point of destabilized crack propagation. The K_(Ic)~D of 300M steel,quenched at 870℃ and separately tempered at 300 and 450℃, was estimated to be50--70 and 54--67 MN/m~(3/2) respectively. It seems to be available, with accuracy abo-ut 20%, to the engineering evaluation.
|
Received: 18 June 1990
|
1 张百伟,张振芳,李淑清,张兴华.金属学报,1985;21:A341 2 朱健,葛庆麟.金属学报,1983;19:A65 3 McDarmaid D S. Met Technol, 1978; 5:7 4 Hippsley C A, Druce S G. Acta Metall, 1986; 34: 1215 5 Hippsley C A, Druce S G. Acta Metall, 1983; 31: 1861 6 Youngblood J L, Ragharan M. Metall Trans, 1977; 8A: 1439 7 Bush A J. ASTM STP 466, 1970: 259 8 Costin L S, Duffy J, Freund L B. ASTM STP 627, 1977: 301 9 Turner C E. ASTM STP 466, 1970: 93 10 Irwin G R. Trans ASME, Ser. A: J Eng Power, 1964; 86: 444q |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|