Microstructure and mechanical properties of HSLA-100 steel
Mattes, Victor R.
Fox, Alan G.
MetadataShow full item record
Light microscopy, scanning electron microscopy, and transmission electron microscopy were employed to examine the microstructural basis for the mechanical properties of as-quenched and tempered HSLA-100 steel. Examination of the alloy revealed granular bainite with martensite and retained austenite in the as-quenched state which upon aging at temperatures below the lower transformation temperature, 677 C, formed tempered bainite with precipitates of copper and carbides. These results indicate the strength and toughness of HSLA- 100 steel aged below 677 C is based primarily on the fine prior austenite grain size and classic copper precipitation behavior but also on the bainite dislocation substructure and carbides. After tempering at 677 C, HSLA-100 steel has a dual-phase microstructure consisting of bainitic ferrite laths, fine ferrite grain clusters and martensite with precipitates of carbides and overaged copper. The results indicate the yield strength of the overaged alloy is based on the fine ferrite grain and bainite lath sizes, the fine carbide distribution and elastic moduli strengthening while the toughness is the result of the high- angle ferrite grain boundaries, the fine intralath carbides and the ductile overaged copper precipitates.
Approved for public release; distribution is unlimited.
Showing items related by title, author, creator and subject.
Mattes, Victor R. (Monterey, California: Naval Postgraduate School, 1990-12);Light microscopy, scanning electron microscopy, and transmission electron microscopy were employed to examine the microstructural basis for the mechanical properties of as-quenched and tempered HSLA-100 steel. Examination ...
A study of the microstructural basis for the strength and toughness properties of overaged HSLA-100 steel Comerford, Lawrence Whitley (Monterey, California. Naval Postgraduate School, 1991-06);A certification program for the use of HSLA steel in ship construction is currently being funded by the U.S. Navy. Integral to this program is the characterization of the microstructure of the highly weldable HSLA-100 ...
A study of the microstructural basis for the strength and toughness properties of as-quenched and quenched and tempered high copper HSLA-100 steel Winters, Harvey Allen (Monterey, California. Naval Postgraduate School, 1991-12);A program for the use of high copper HSLA-100 steel as a replacement for HY-130 in ship construction is in progress at the David Taylor Naval Research Center in Annapolis, Maryland. The characterization of the microstructure ...