Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel

Keyou S. Mao; Yaqiao Wu; Cheng Sun; Emmanuel Perez; Janelle P. Wharry

doi:10.1016/j.mtla.2018.08.012

Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel

Keyou S. Mao, Yaqiao Wu, Cheng Sun, Emmanuel Perez, Janelle P. Wharry

Research and Economic Development

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

4 Scopus citations

Abstract

We first report the formation of partially amorphous Mn–Si precipitates due to laser welding of face centered cubic (fcc) 304 stainless steel. Transmission electron microscopy and precession electron diffraction studies in the heat affected zone (HAZ) of the weldment indicate the formation of Mn–Si precipitates in grain interiors. Precipitates exhibit Mn–Si stoichiometry and the partially crystalline regions have a lattice constant of 0.45 nm. It is surmised that the rapid cooling rates during the laser weld melt pool solidification process may be sufficient to inhibit the complete crystallization of these precipitates.

Original language	American English
Pages (from-to)	174-177
Number of pages	4
Journal	Materialia
Volume	3
DOIs	https://doi.org/10.1016/j.mtla.2018.08.012
State	Published - 1 Nov 2018

Keywords

304 stainless steel
amorphous precipitation
interface
laser welding
precipitation
transmission electron microscopy

EGS Disciplines

Materials Science and Engineering

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10.1016/j.mtla.2018.08.012

https://doi.org/10.1016/j.mtla.2018.08.012

Cite this

@article{f18dda58cf3c4b3cb1ba753d0e26c8a2,

title = "Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel",

abstract = " We first report the formation of partially amorphous Mn–Si precipitates due to laser welding of face centered cubic (fcc) 304 stainless steel. Transmission electron microscopy and precession electron diffraction studies in the heat affected zone (HAZ) of the weldment indicate the formation of Mn–Si precipitates in grain interiors. Precipitates exhibit Mn–Si stoichiometry and the partially crystalline regions have a lattice constant of 0.45 nm. It is surmised that the rapid cooling rates during the laser weld melt pool solidification process may be sufficient to inhibit the complete crystallization of these precipitates.",

keywords = "304 stainless steel, amorphous precipitation, interface, laser welding, precipitation, transmission electron microscopy",

author = "Mao, {Keyou S.} and Yaqiao Wu and Cheng Sun and Emmanuel Perez and Wharry, {Janelle P.}",

note = "Mao, Keyou S.; Wu, Yaqiao; Sun, Cheng; Perez, Emmanuel; and Wharry, Janelle P. (2018). {"}Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel{"}. Materialia, 3, 174-177. doi: https://doi.org/10.1016/j.mtla.2018.08.012",

year = "2018",

month = nov,

day = "1",

doi = "10.1016/j.mtla.2018.08.012",

language = "American English",

volume = "3",

pages = "174--177",

}

TY - JOUR

T1 - Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel

AU - Mao, Keyou S.

AU - Wu, Yaqiao

AU - Sun, Cheng

AU - Perez, Emmanuel

AU - Wharry, Janelle P.

N1 - Mao, Keyou S.; Wu, Yaqiao; Sun, Cheng; Perez, Emmanuel; and Wharry, Janelle P. (2018). "Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel". Materialia, 3, 174-177. doi: https://doi.org/10.1016/j.mtla.2018.08.012

PY - 2018/11/1

Y1 - 2018/11/1

N2 - We first report the formation of partially amorphous Mn–Si precipitates due to laser welding of face centered cubic (fcc) 304 stainless steel. Transmission electron microscopy and precession electron diffraction studies in the heat affected zone (HAZ) of the weldment indicate the formation of Mn–Si precipitates in grain interiors. Precipitates exhibit Mn–Si stoichiometry and the partially crystalline regions have a lattice constant of 0.45 nm. It is surmised that the rapid cooling rates during the laser weld melt pool solidification process may be sufficient to inhibit the complete crystallization of these precipitates.

AB - We first report the formation of partially amorphous Mn–Si precipitates due to laser welding of face centered cubic (fcc) 304 stainless steel. Transmission electron microscopy and precession electron diffraction studies in the heat affected zone (HAZ) of the weldment indicate the formation of Mn–Si precipitates in grain interiors. Precipitates exhibit Mn–Si stoichiometry and the partially crystalline regions have a lattice constant of 0.45 nm. It is surmised that the rapid cooling rates during the laser weld melt pool solidification process may be sufficient to inhibit the complete crystallization of these precipitates.

KW - 304 stainless steel

KW - amorphous precipitation

KW - interface

KW - laser welding

KW - precipitation

KW - transmission electron microscopy

UR - https://scholarworks.boisestate.edu/mse_facpubs/370

UR - https://doi.org/10.1016/j.mtla.2018.08.012

UR - http://www.scopus.com/inward/record.url?scp=85061041525&partnerID=8YFLogxK

U2 - 10.1016/j.mtla.2018.08.012

DO - 10.1016/j.mtla.2018.08.012

M3 - Article

VL - 3

SP - 174

EP - 177

JO - Materialia

JF - Materialia

ER -

Laser Weld-Induced Formation of Amorphous Mn–Si Precipitate in 304 Stainless Steel

Abstract

Keywords

EGS Disciplines

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