Design of crack-free laser additive manufactured Inconel 939 alloy driven by computational thermodynamics method

• DOI: 10.1557/s43579-022-00253-x
• Publication Date: 2022-09-09T18:20:17Z
• Authors: Congyuan Zeng; Huan Ding; Uttam Bhandari; S. M. Guo
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract This paper examined the effect of Si addition on cracking resistance Inconel 939 alloy after laser additive manufacturing (AM) process. With help CALculation PHAse Diagrams (CALPHAD) software Thermo-Calc, amounts specific elements (C, B, and Zr) in liquid phase during solidification, susceptibility coefficients (CSC) criterion based $$\left| {{\text{d}}T/{\text{d}}f_{{\text{s}}}^{1/2} } \right|$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:mrow> <mml:mtext>d</mml:mtext> <mml:mi>T</mml:mi> <mml:mo>/</mml:mo> <mml:msubsup> <mml:mi>f</mml:mi> <mml:mtext>s</mml:mtext> </mml:mrow> <mml:mn>1</mml:mn> <mml:mn>2</mml:mn> </mml:msubsup> </mml:mfenced> </mml:math> values ( T : solidification temperature, f s mass fraction solid solidification) were evaluated as indicators for composition optimization. It was found that CSC together with provided a better prediction resistance. Graphical abstract