Access the full text.
Sign up today, get DeepDyve free for 14 days.
R. Irani (1982)
Towards improved performance of tool materials : proceedings of the international conference sponsored and organized jointly by the National Physical Laboratory and the Metals Society and held at the National Physical Laboratory, Teddington, Middlesex on 28 and 29 April 1981
R. Irani, C. Wright, A. Wronski (1982)
Tempered carbides in high-speed steelsJournal of Materials Science Letters, 1
H. Hübner, W. Jillek (1977)
Sub-critical crack extension and crack resistance in polycrystalline aluminaJournal of Materials Science, 12
R. Cook, D. Clarke (1988)
Fracture stability, R-curves and strength variabilityActa Metallurgica, 36
J. Bolton, M. Youseffi (1993)
Fracture Toughness of Sintered Metal Matrix Composites Based Upon High Speed Steels Enriched with Hard Ceramic CarbidesPowder Metallurgy, 36
B. Majumdar, A. Rosenfield, W. Duckworth (1988)
Analysis of R-curve behavior of non-phase-transforming ceramicsEngineering Fracture Mechanics, 31
A. Wronski, M. Rebbeck, S. Amen (1988)
Fracture mechanisms and mechanics of an 18-4-1 high speed steelJournal of Materials Science, 23
A. S. Wronski, M. Gomes, C. S. Wright (1992)
Failure Analysis: Techniques and Applications
M. Gomes, A. Wronski, C. Wright (1995)
FRACTURE BEHAVIOUR OF A HIGHLY ALLOYED HIGH SPEED STEELFatigue & Fracture of Engineering Materials & Structures, 18
Ş. Karagöz, H. Andrén (1987)
Secondary Hardening in High Speed SteelsInternational Journal of Materials Research, 83
W. Price, M. Rebbeck, A. Wronski, S. Amen (1985)
Effect of Carbon Additions on Sintering to Full Density of BT1 Grade High Speed SteelPowder Metallurgy, 28
S. Biner (1994)
A numerical analysis of crack growth in microcracking brittle solidsActa Metallurgica Et Materialia, 42
A. Wronski, L. Al-Yasiri, F. Jagger (1979)
Comparison of Strength and Toughness of Wrought and Directly Sintered T6 High-Speed SteelPowder Metallurgy, 22
Y. Mai, B. Lawn (1987)
Crack‐Interface Grain Bridging as a Fracture Resistance Mechanism in Ceramics: II, Theoretical Fracture Mechanics ModelJournal of the American Ceramic Society, 70
The stresses for macroscopic plastic flow and critical stages of fracture, fracture toughness and hardness of sintered plus forged T1 high speed steel were determined. The results are compared to similar data for sintered, sintered to closed porosity plus hot isostatically pressed and electroflux refined (EFR) alloys of comparable composition. EFR meltstock, with addition of 0.6 wt% Mo, was water-atomized in a 200 kg unit which incorporated ceramic filters and an argon shroud to ensure maximum cleanliness. The powder was sieved, <125 μm, vacuum annealed, blended, isostatically compacted and vacuum sintered and hot forged to produce a 300 kg billet. Mechanical properties were determined in four-point bending of heat-treated beam specimens. Most samples showed evidence of macroscopic plastic flow, up to ∼1%, beyond a stress of ∼1.8 GPa, σY. Using surface replica microscopy, crack nucleation was detected at stresses σN, between 0.5 and 0.9 σY, and subcritical short crack growth, at stresses generally larger than σY. Fracture, from crack nuclei associated (only) with fractured M6C carbides, took place at stresses, σF, in the range 1.4 to 3.0 GPa Macroscopic fracture toughness, KIC, was in the range 17–24 MPa m1/2 and, like σN and σF, appeared to depend sensitively on the tempering temperature. The most attractive combination of properties, for the overtempered, 580°C, structure at HV50 ∼750 appears to be: σY≈1.9 GPa, σF≈2.8 GPa, KIC≈23 MPa m1/2. These values are comparable to those for EFR aerospace quality T1 high speed steel.
Journal of Materials Science – Springer Journals
Published: Sep 11, 2004
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.