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Development of Electron Beam welding for similar and dissimilar joints of 9Cr-1Mo Steel and Stainless Steel 316L(N). 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

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slide1

Development of Electron Beam welding for similar and

dissimilar joints of 9Cr-1Mo Steel and Stainless Steel 316L(N)

CVS Murthy1 P Mastanaiah1 Shaju K Albert2 Chitta Ranjan Das2Dasarath Ram1AK Bhaduri2

1 Defence Research and Development Laboratory, Hyderabad

2 Indira Gandhi Center for Atomic Research, Kalpakkam

slide2

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)
slide3

EXPERIMENTATION

9Cr-1Mo Steel to SS316L(N)

SS316L(N) to SS316L(N)

9Cr-1Mo Steel to 9Cr-1Mo Steel

EBW

  • Tensile Test
  • Charpy V-notch Impact Test
  • Bend (face/root) Test
  • Microhardness
slide4

EB Welding Parameters

9Cr-1Mo Steel to 9Cr-1Mo Steel

SS316L(N) to SS316L(N)

9Cr-1Mo Steel to SS316L(N)

slide7

Charpy V-notch Impact Test

Temperature : 21.50C

slide8

Bend Test

EB Welds of SS316LN and 9Cr-1Mo Steel

  • Three point bend test
  • Specimen prepared as per
  • ASME B&PVC Code Section IX
slide9

Bend Test

Crack

Crack

Bend specimens - Dissimilar EB Weld

slide11

Macrostructures of Dissimilar Weld

  • Lack of sidewall fusion / crack observed at the SS316 weld interface
slide12

Macro/Micro structures of SS316L(N) EB Welds

SS EB weld

Macrostructure of

EB Weld of SS316L(N)