The effect of aging treatment on the microstructure and properties of copper-precipitation strengthened HSLA steel
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Authors
Heinze, Marvin H.
Subjects
HSLA-100
Advisors
Saboury, Saeed
Losz, J. Mauro B.
Date of Issue
1988-12
Date
December 1988
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The high strength low alloy (HSLA) steels which are being developed as replacements for the HY family of steels ire low carbon steels which derive their strength in part due to the precipitation of fine coherent copper particles formed during a quench and aging heat treatment. HSLA-100 is being developed to meet the strength and
toughness requirements of HY-100 but can be easily welded without preheat, thereby reducing fabrication costs. This investigation uses light and electron microscopy for microstructural characterization while tensile, Charpy, and hardness tests are relied upon for the mechanical properties. The microstructure and mechanical characteristics of HSLA- 100 after aging at several different temperatures was correlated. A high ductility and the minimum 100 csi yield strength was found after aging at 675 C, although this temperature was found to be close to the low eutectoid temperature displayed by HSLA-100. Splitting was observed in the tensile fracture surfaces but the mechanical properties were not adversely affected.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
58 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.