Experimental investigation and analysis of dimensional accuracy of laser-based powder bed fusion made specimen by application of response surface methodology


This study reports the dimensional accuracy of laser based powder bed fusion made parts with the effect of various input parameters while processing CL50WS material as the workpiece material. CL50WS material is mainly used in die and mould manufacturing industry for making die, tool insert, mould or casting die. In today’s competitive era, the quality of the final product is driven by the mechanical properties of the die or mould, for die and mould manufacturing industry. This study focuses on studying the effects of process parameters, such as laser power, scanning speed, layer thickness and hatch spacing, on fabricated specimens. Analysis of variance was used to test the adequacy of the established models and also to find the significance of the parameters on response. The R2 was found to be 0.9265 which depicted that the developed models are suitable and effectively predict the dimensional accuracy within the range of chosen process parameters. The results suggest that layer thickness is the most significant parameters for dimensional accuracy.

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Correspondence to M. E. Gajera.

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Hiren, M., Gajera, M.E., Dave, K.G. et al. Experimental investigation and analysis of dimensional accuracy of laser-based powder bed fusion made specimen by application of response surface methodology. Prog Addit Manuf 4, 371–382 (2019). https://doi.org/10.1007/s40964-019-00076-8

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  • Additive manufacturing, Laser-based powder bed fusion
  • RSM
  • CL50WS
  • Shrinkage rate