TY - JOUR
T1 - Micromechanical testing of fracture initiation sites in welded high-strength low-alloy steel
AU - Rogne, Bjørn Rune Sørås
AU - Thaulow, Christian
AU - Barnoush, Afrooz
PY - 2014/4/1
Y1 - 2014/4/1
N2 - Micropillar compression tests were performed on martensite (M) and retained austenite (A) containing constituents formed in high-strength low-alloy steel after simulated thermal weld heat treatment. Due to the complicated fine microstructure of the constituent, the resulted stress-strain curves were further analyzed by considering the post-mortem scanning electron micrographs and the morphology of the deformation of the pillars. It was possible to obtain relevant data for the uniaxial stress-strain behavior of the M-A constituent in the studied steel. Microvickers measurements, which were converted to macroscopic yield stress by empirical relations, were compared with the micropillar compression test results. Comparison showed that these empirical relations are overestimating the obtained mechanical properties of the M-A constituents.
AB - Micropillar compression tests were performed on martensite (M) and retained austenite (A) containing constituents formed in high-strength low-alloy steel after simulated thermal weld heat treatment. Due to the complicated fine microstructure of the constituent, the resulted stress-strain curves were further analyzed by considering the post-mortem scanning electron micrographs and the morphology of the deformation of the pillars. It was possible to obtain relevant data for the uniaxial stress-strain behavior of the M-A constituent in the studied steel. Microvickers measurements, which were converted to macroscopic yield stress by empirical relations, were compared with the micropillar compression test results. Comparison showed that these empirical relations are overestimating the obtained mechanical properties of the M-A constituents.
UR - http://www.scopus.com/inward/record.url?scp=84899116686&partnerID=8YFLogxK
U2 - 10.1007/s11661-013-2168-y
DO - 10.1007/s11661-013-2168-y
M3 - Article
AN - SCOPUS:84899116686
SN - 1073-5623
VL - 45
SP - 1996
EP - 2003
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 4
ER -