On the Characteristic Features of Dislocations during Ratcheting–Creep Interaction

Dutta, Krishna; Mishra, Swagatika; Dwivedi, Pushpendra Kumar; Sivateja, Chinnam

doi:10.1007/s11665-021-05934-7

Cited by 5 publications

(1 citation statement)

References 42 publications

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“…Dislocation density is also computed through X-ray diffraction method. It is computed using a modi ed Williamson hall plot [55][56][57][58]. In modi ed W-H plot, K is substituted by KC 1/2 as per EQs.…”

Section: Dislocation Density Measurementmentioning

confidence: 99%

Experimental investigation on deposits of ER70S-6 wire on SiO2 substrate using non-transferred arc-based wire arc additive manufacturing

Pattanayak

Sahoo

2022

Int J Adv Manuf Technol

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Recent trends in additive manufacturing (AM) are to produce geometrically complex structures at minimal wastage of material, time and cost, without sacri cing part quality, mechanical performance and to introduce ease in processing and part removal. Here a non-transferred arc (NTA) based wire arc additive manufacturing (WAAM) system has been developed to achieve the above objectives, where arc is only generated between tungsten electrode and consumable ller wire. No electrical contact with substrate facilitates deposits even on non-conductive substrate surface that helps in easy removal of nal deposits. In uence of deposition parameters (welding current, voltage, wire feed speed (WFS), and travel speed) on response characteristics (bead uniformity, height deviation, droplet diameter, droplet transfer frequency) is studied on multi-performance level using grey relational analysis (GRA). Then single and multi-bead layer is fabricated over SiO 2 substrate for ease in part removal after complete fabrication. WFS is referred as a key deposition parameter which have in uence on all deposition characteristics. It has been observed that NTA based WAAM results high bead uniformity with minimal spatter and bead height difference between start and exit arc point. Complete ferrite microstructure with few pearlites is observed on the deposits with similar elemental composition on top, bottom and interface surface. X-ray diffraction (XRD) study reveals ferrite diffraction planes ({110}, {200}, {211}, and {220}) with no intermetallic formations on deposits. Also, compressive residual stress with less variation in crystallite size, stress, strain and microhardness among top, bottom, and lateral surface of deposit indicates isotropic nature of the fabricated part.

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Section: Dislocation Density Measurementmentioning

confidence: 99%