Micromechanical testing of fracture initiation sites in welded high-strength low-alloy steel

Bjørn Rune Sørås Rogne; Christian Thaulow; Afrooz Barnoush

doi:10.1007/s11661-013-2168-y

Micromechanical testing of fracture initiation sites in welded high-strength low-alloy steel

Bjørn Rune Sørås Rogne
, Christian Thaulow
, Afrooz Barnoush^*

^*Corresponding author for this work

Norwegian University of Science and Technology

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1996-2003
Number of pages	8
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	45
Issue number	4
DOIs	https://doi.org/10.1007/s11661-013-2168-y
Publication status	Published - 1 Apr 2014
Externally published	Yes

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abstract = "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.",

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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.

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SN - 1073-5623

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JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

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ER -

Micromechanical testing of fracture initiation sites in welded high-strength low-alloy steel

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