Fracture Toughness of Simulated Heat-Affected Zones in NUCu-140 Steel

被引：0
|
作者：
Leister, B. M. [1 ]
DuPont, J. N. [1 ]
机构：
[1] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA
来源：
WELDING JOURNAL | 2012年 / 91卷 / 02期
关键词：
Fracture Toughness; Heat-Affected Zone; High-Strength Steel; Low-Carbon Steel; Copper Precipitates; LOW-CARBON STEELS; CU-BASED STEEL; TEMPORAL EVOLUTION; FE; SEGREGATION; NUCLEATION; GROWTH;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The fracture toughness of simulated heat-affected zones (HAZ) in NUCu-140 steel was investigated. The subcritical, intercritical, and fully recrystallized HAZ regions exhibited a reduction in hardness and increases in toughness relative to the base metal. The base metal and these. HAZ regions all exhibited a fracture mode of microvoid coalescence. The coarse-grain HAZ exhibited a slight increase in hardness and a mixed fracture mode of cleavage/microvoid coalescence, but the toughness was comparable to that of the base metal. The impact toughness was higher in the longitudinal-transverse (LT) orientation compared to the transverse-longitudinal (TL) orientation. The increased toughness of the subcritical, intercritical, and fully recrystallized regions was attributed to softening associated with changes in the copper precipitates during welding. Differences in impact toughness observed between the LT and TL orientations were due to anisotropy from the rolling procedure, and the anisotropy persisted throughout the HAZ samples.
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页码：53S / 58S
页数：6
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