Effects of particle spacing and void nucleation characteristics on the toughness of high strength steels.

• Autorzy: Wojcieszynski A.L. , Garrison W.M. , Iorio L.E. , Nakashima T.
• Konferencja: XVth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'98, 17-21 May, 1998, Kraków-Krynica, Poland
• Języki publikacji: EN

Abstrakty

EN

In this work we have examined the effects of inclusion spacing and inclusion void nucleation resistance on toughness for several fine scale microstructures for the case of ductile fracture. It was found for high strength fine-scale microstructures that the crack tip opening displacement at fracture can increase almost linearly with increasing inclusion spacing. However, as the strength of the fine-scale microstructure decreases to about 850 MPa the toughness of the fine scale microstructure becomes essentially independent of inclusion spacing, at least over the range of inclusion spacings which could be obtained experimentally. It has also been found that exceptional increases in toughness can be achieved by gettering sulphur as titanium carbosulfide rather than as manganese sulfide. These improvements in toughness have been observed in steels having yield strengths ranging from 850 MPa to 1500 MPa. The improvement in toughness associated with gettering sulfur as titanium carbosulfide has been attributed to particles of titanium carbosulfide being more resistant to void nucleation than particles of manganese sulfide or lanthanum oxy-sulfides.

Słowa kluczowe

EN

microstructure; grain; displacement; heat treatment; toughness; high strength steel

PL

mikrostruktura; ziarno; przemieszczenie; obróbka cieplna; wiązkość; stal o dużej wytrzymałości

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 3
• Strony: 299--302
• Opis fizyczny: Bibliogr. 7 poz., tab., rys.

Twórcy

autor

Wojcieszynski A.L.

• Crucible Research Center, Pittsburgh, USA

autor

Garrison W.M.

• Carnegie Mellon University, Pittsburgh, USA

autor

Iorio L.E.

• Carnegie Mellon University, Pittsburgh, USA

autor

Nakashima T.

• Daido Steel Co. Ltd., Nagoya-City, Japan

• Crucible Research Center, Pittsburgh, USA

Bibliografia

• [1] K.E. Puttick, Phil. Mag., 4, p.964, (1959).
• [2] J. W. Bray J.L. Maloney, K.S. Raghavan and W.M. Garrison Jr., Metall. Trans. A ,22A, p.2227-2285, (1991).
• [3] J.R. Rice and M.A. Johnson, Inelastic Behavior of Solids, McGraw-Hill, New York, p. 641, (1970)
• [4] K.J.Handerhan, W.M. Garrison Jr. And N.R. Moody, Metall. Trans. A, 20A, p.105-123 (1989)
• [5] W.M. Garrison Jr., J.L. Maloney and A.L. Wojcieszynski, Proceedings of the Gilbert R. Speich Symposium at the 35th Metal Working Conference, Montreal, Canada, Oct.25-28, 1992. Iron and Steel Society p. 237-246, (1992).
• [6] J.L. Maloney and W.M. Garrison Jr., Scripta Matall., 23, P.2097-2100, (1989).
• [7] W.M. Garrison Jr., A.L. Wojcieszynski and B. Ramalingham, Proceedings of the International Symposium on High Performance Steels for Structural Applications, Oct. 30-Nov. 1, 1995, Cleveland, Ohio, Iron and Steel Society, p. 257-268, (1995)