CVS Murthy 1 P Mastanaiah 1 Shaju K Albert 2 Chitta Ranjan Das 2 Dasarath Ram 1 AK Bhaduri 2 1 Defence Research and Development Laboratory, Hyderabad 2.

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Presentation transcript:

CVS Murthy 1 P Mastanaiah 1 Shaju K Albert 2 Chitta Ranjan Das 2 Dasarath Ram 1 AK Bhaduri 2 1 Defence Research and Development Laboratory, Hyderabad 2 Indira Gandhi Center for Atomic Research, Kalpakkam Development of Electron Beam welding for similar and dissimilar joints of 9Cr-1Mo Steel and Stainless Steel 316L(N)

Collaborative Project - IGCAR & DRDL EB Welding of SS316 LN to SS316L(N) EB Welding of 9Cr-1Mo Steel to 9Cr-1Mo Steel EB Welding of 9Cr-1Mo Steel to SS316L(N) EB Welding of LAFM Steel to SS316L(N)

Tensile Test Charpy V-notch Impact Test Bend (face/root) Test Microhardness EBW 9Cr-1Mo Steel to 9Cr-1Mo Steel SS316L(N) to SS316L(N) 9Cr-1Mo Steel to SS316L(N) EXPERIMENTATION

EB Welding Parameters Beam Current115mA Gun Voltage55kV Welding speed1 m/min Gun to work distance 283mm FocusBelow the surface Beam Current95mA Gun Voltage55kV Welding speed1 m/min Gun to work distance 283mm FocusBelow the surface Beam Current98 mA Gun Voltage55kV Welding speed1 m/min Gun to work distance 283mm FocusBelow the surface 9Cr-1Mo Steel to 9Cr-1Mo Steel SS316L(N) to SS316L(N) 9Cr-1Mo Steel to SS316L(N)

TENSILE PROPERTIES

MICROHARDNESS

Charpy V-notch Impact Test Type of EB WeldImpact Energy (J) 9Cr-1Mo steel to SS316LN 265 9Cr-1Mo steel to 9Cr-1Mo steel 160 SS316LN to SS316LN> 300 Temperature : C

Bend Test EB Welds of SS316LN and 9Cr-1Mo Steel Three point bend test Specimen prepared as per ASME B&PVC Code Section IX

Bend Test Crack Bend specimens - Dissimilar EB Weld

Macrostructure of weld of 9Cr-1Mo Steel

Macrostructures of Dissimilar Weld Lack of sidewall fusion / crack observed at the SS316 weld interface

SS EB weld Macrostructure of EB Weld of SS316L(N) Macro/Micro structures of SS316L(N) EB Welds

THANK YOU

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