Vol 21, No 2 (2017) > Material and Metalurgical Engineering >

Residual Stress Measurements on the TIG Weld Joint of 57Fe15Cr25Ni Austenitic Steel for Structural Material Applications by Means X-Ray Diffraction Techniques

Parikin Parikin 1 , Agus Hadi Ismoyo 1 , Riza Iskandar 2 , Arbi Dimyati 1

Affiliations:

  1. Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency (BATAN), Puspiptek Serpong, South Tangerang 15314, Indonesia
  2. Central Facility for Electron Microscopy (GFE), RWTH Aachen University, Ahorn Strausse 55, D-52074 Aachen, Germany

 

Abstract: Measurements of residual stress on the 57%Fe25%Cr15%Ni steel plate with no-filler TIG-welding process were carried out. This work was conducted to determine the nature of weld ability in synthesized steel. The bulks were formed in a
dimension of 30x20x7 mm3 to ease data retrieval. Results show that the largest residual stress occurred in the weldcore area, amounting to 82.40 MPa with lattice stretching of 0.18%. Conversely, the values decreased to 65.92 MPa and a stretch of 0.14% in the HAZ area. This residual stress is a tensile stress that can reduce the mechanical strength of the material since it adds to the applied loads. This was confirmed by microstructure observations. The carbon content was very high in the dark lines. Weaken materials usually start from this side and could initiate the intergranular cracks that rapidly migrate among its grain boundaries.
Keywords: 57Fe25Cr15Ni alloy, no-filler welding, X-ray diffraction, Scanning Electron Microscopy, Optical Microscopy
Published at: Vol 21, No 2 (2017) pages: 49-57
DOI:

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