NDLI: Microstructure and properties of quenched-and-aged plates produced from a copper-bearing HSLA steel

Content Provider	Springer Nature Link
Author	Sen, S. K. Ray, A. Avtar, R. Dhua, S. K. Prasad, M. S. Jha, P. Sengupta, P. P. Jha, S.
Copyright Year	1998
Abstract	For the first time in India, quenched-and-tempered (Q&T) plates of a copper-bearing high-strength lowalloy (HSLA) steel have been commercially developed for naval structural applications. A 50 ton production heat was made through electric arc furnace (EAF)-vacuum arc degassing (VAD) route and continuously cast into 170 mm thick slabs. These slabs were conditioned, reheated in walking-beam furnace and hot rolled in plate mill into plates of 10 to 16 mm thickness. The as-rolled plates were hardened through oil quenching and subsequently tempered (aged) at 630 ‡C to achieve the combination of highstrength and good low-temperature impact toughness.The microstructures of heat treated plates showed fine acicular ferrite with grain sizes ranging between ASTM No. 9 and 10. From the standpoint of tensile properties, Q&T plates of all thicknesses exhibited significantly higher yield strengths than the minimum stipulated value of 552 MPa for HY-80/HSLA-80 steels. The elongation (22.20 to 26.00%) and reduction in area (62.12 to 67.62%) values achieved also exceeded the respective minimum requirements of 20 and 50% stipulated for such steels. The trend in variation of Charpy V-notch (CVN) impact energies at room temperature, -18, and -62 ‡C not only showed significantly higher values than that stipulated for HY-80 and HSLA-100 steels at -18 ‡C, but also indicated that the CVN impact energies achieved (105.15 to 144.25 J) at -62 ‡C were higher than the estimated value of 90 J for HSLA-80/HSLA-100 steels at this temperature.
Starting Page	504
Ending Page	510
Page Count	7
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	7
Issue Number	4
e-ISSN	15441024
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	copper-bearing plate steel HSLA-80 HY-80 precipitation hardening acicular ferrite Characterization and Evaluation of Materials Materials Science Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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