2017
DOI: 10.1017/s1431927617011722
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EBSD and TEM Analysis of the Heat Affected Zone of Laser Welded AISI 304/308 Stainless Steel

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“…However, after welding, the HAZ experiences a rapid cooling rate (~10 3 to 10 7 K/s), which directly controls the solidification mode, and thus has considerable implications on the resultant microstructure [1]. Specifically in austenitic steels, a fine-grained dendritic microstructure is likely to form [2,3], and a phase transformation from austenite to martensite is favorable [4]. However, the predominant phase in the HAZ is austenite with a portion of δ ferrite, dependent on the weld material and solidification mode [5].…”
mentioning
confidence: 99%
“…However, after welding, the HAZ experiences a rapid cooling rate (~10 3 to 10 7 K/s), which directly controls the solidification mode, and thus has considerable implications on the resultant microstructure [1]. Specifically in austenitic steels, a fine-grained dendritic microstructure is likely to form [2,3], and a phase transformation from austenite to martensite is favorable [4]. However, the predominant phase in the HAZ is austenite with a portion of δ ferrite, dependent on the weld material and solidification mode [5].…”
mentioning
confidence: 99%