Strength recovery in a high-strength steel during multiple weld thermal simulations

Xinghua Yu; Jeremy L. Caron; S. S. Babu; John C. Lippold; Dieter Isheim; David N. Seidman

doi:10.1007/s11661-011-0707-y

Strength recovery in a high-strength steel during multiple weld thermal simulations

Xinghua Yu^*, Jeremy L. Caron, S. S. Babu, John C. Lippold, Dieter Isheim, David N. Seidman

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

BlastAlloy 160 (BA160) is a low-carbon martensitic steel strengthened by copper and M₂C precipitates. Heat-affected zone (HAZ) microstructure evaluation of BA160 exhibited softening in samples subjected to the coarse-grained HAZ thermal simulations of this steel. This softening is partially attributed to dissolution of copper precipitates and metal carbides. After subjecting these coarse-grained HAZs to a second weld thermal cycle below the A _c1 temperature (at which austenite begins to form on heating), recovery of strength was observed. Atom-probe tomography and microhardness analyses correlated this strength recovery to re-precipitation of copper precipitates and metal carbides. A continuum model is proposed to rationalize strengthening and softening in the HAZ regions of BlastAlloy 160.

Original language	English
Pages (from-to)	3669-3679
Number of pages	11
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	42
Issue number	12
DOIs	https://doi.org/10.1007/s11661-011-0707-y
Publication status	Published - Dec 2011
Externally published	Yes

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title = "Strength recovery in a high-strength steel during multiple weld thermal simulations",

abstract = "BlastAlloy 160 (BA160) is a low-carbon martensitic steel strengthened by copper and M2C precipitates. Heat-affected zone (HAZ) microstructure evaluation of BA160 exhibited softening in samples subjected to the coarse-grained HAZ thermal simulations of this steel. This softening is partially attributed to dissolution of copper precipitates and metal carbides. After subjecting these coarse-grained HAZs to a second weld thermal cycle below the A c1 temperature (at which austenite begins to form on heating), recovery of strength was observed. Atom-probe tomography and microhardness analyses correlated this strength recovery to re-precipitation of copper precipitates and metal carbides. A continuum model is proposed to rationalize strengthening and softening in the HAZ regions of BlastAlloy 160.",

author = "Xinghua Yu and Caron, {Jeremy L.} and Babu, {S. S.} and Lippold, {John C.} and Dieter Isheim and Seidman, {David N.}",

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T1 - Strength recovery in a high-strength steel during multiple weld thermal simulations

AU - Yu, Xinghua

AU - Caron, Jeremy L.

AU - Babu, S. S.

AU - Lippold, John C.

AU - Isheim, Dieter

AU - Seidman, David N.

PY - 2011/12

Y1 - 2011/12

N2 - BlastAlloy 160 (BA160) is a low-carbon martensitic steel strengthened by copper and M2C precipitates. Heat-affected zone (HAZ) microstructure evaluation of BA160 exhibited softening in samples subjected to the coarse-grained HAZ thermal simulations of this steel. This softening is partially attributed to dissolution of copper precipitates and metal carbides. After subjecting these coarse-grained HAZs to a second weld thermal cycle below the A c1 temperature (at which austenite begins to form on heating), recovery of strength was observed. Atom-probe tomography and microhardness analyses correlated this strength recovery to re-precipitation of copper precipitates and metal carbides. A continuum model is proposed to rationalize strengthening and softening in the HAZ regions of BlastAlloy 160.

AB - BlastAlloy 160 (BA160) is a low-carbon martensitic steel strengthened by copper and M2C precipitates. Heat-affected zone (HAZ) microstructure evaluation of BA160 exhibited softening in samples subjected to the coarse-grained HAZ thermal simulations of this steel. This softening is partially attributed to dissolution of copper precipitates and metal carbides. After subjecting these coarse-grained HAZs to a second weld thermal cycle below the A c1 temperature (at which austenite begins to form on heating), recovery of strength was observed. Atom-probe tomography and microhardness analyses correlated this strength recovery to re-precipitation of copper precipitates and metal carbides. A continuum model is proposed to rationalize strengthening and softening in the HAZ regions of BlastAlloy 160.

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

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IS - 12

ER -

Strength recovery in a high-strength steel during multiple weld thermal simulations

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