Solidification behavior of austenitic stainless steel filler metals

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Thermal analysis and interrupted solidification experiments on selected austenitic stainless steel filler metals provided an understanding of the solidification behavior of austenitic stainless steel welds. The sequences of phase separations found were for type 308 stainless steel filler metal, L + L + delta + L + delta + ..gamma.. ..-->.. ..gamma.. + delta, and for type 310 stainless steel filler metal, L ..-->.. L + ..gamma.. ..-->.. ..gamma... In type 308 stainless steel filler metal, ferrite at room temperature was identified as either the untransformed primary delta-ferrite formed during the initial stages of solidification or the residual ferrite after ... continued below

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Pages: 27

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David, S.A.; Goodwin, G.M. & Braski, D.N. February 1, 1980.

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Description

Thermal analysis and interrupted solidification experiments on selected austenitic stainless steel filler metals provided an understanding of the solidification behavior of austenitic stainless steel welds. The sequences of phase separations found were for type 308 stainless steel filler metal, L + L + delta + L + delta + ..gamma.. ..-->.. ..gamma.. + delta, and for type 310 stainless steel filler metal, L ..-->.. L + ..gamma.. ..-->.. ..gamma... In type 308 stainless steel filler metal, ferrite at room temperature was identified as either the untransformed primary delta-ferrite formed during the initial stages of solidification or the residual ferrite after Widmanstaetten austenite precipitation. Microprobe and scanning transmission electron microscope microanalyses revealed that solute extensively redistributes during the transformation of primary delta-ferrite to austenite, leading to enrichment and stabilization of ferrite by chromium. The type 310 stainless steel filler metal investigated solidifies by the primary crystallization of austenite, with the transformation going to completion at the solidus temperature. In our samples residual ferrite resulting from solute segregation was absent at the intercellular or interdendritic regions.

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Pages: 27

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Dep. NTIS, PC A03/MF A01.

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  • Report No.: ORNL/TM-7116
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/5563513 | External Link
  • Office of Scientific & Technical Information Report Number: 5563513
  • Archival Resource Key: ark:/67531/metadc1087744

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  • February 1, 1980

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • March 23, 2018, 1:06 p.m.

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David, S.A.; Goodwin, G.M. & Braski, D.N. Solidification behavior of austenitic stainless steel filler metals, report, February 1, 1980; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1087744/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.