Study of laser directed energy deposition of Inconel 625 and austenitic steel

Abstract

Functionally graded material (FGM) is an advanced material that illustrates the number of properties in a single component. To develop FGM, it is very important to study each component gradient separately to understand the properties and their behaviour. This paper presents the study of the properties of deposited blocks of the different gradients of Inconel 625 (IN625) and stainless steel 304L (SS304L) (25% IN625 + 75% SS304L, 50% IN625 + 50% SS304L, 75% IN625 + 25% SS304L, and 100% IN625) by a laser directed energy deposition technique. Various tests were performed to understand its mechanical, metallurgical, and chemical behaviour. Deposited samples were heat-treated and then optical microscopy and microhardness were measured and compared to untreated ones and results found to be comparatively improved.

Study of parametric effect on laser directed energy deposited Austenitic steel and Inconel functionally graded material

“…They studied the influence of wire electro discharge machining (WEDM) on deposited blocks, 21 influence of substrate on different gradient 22 and material characterization of deposited blocks. 23…”

“…Very few works are reported in the fabrication of functionally graded SS304L/IN625. [20][21][22][23] Carroll et al 20 developed an FGM block of a square crosssection of 16 mm wide and 34 mm tall by 910 W YAG laser using the DED technique. They conducted experimental and thermodynamic studies on FGM and found the presence of (Mo,Nb)C secondary phase which is responsible for crack development.…”

“…They conducted experimental and thermodynamic studies on FGM and found the presence of (Mo,Nb)C secondary phase which is responsible for crack development. Tudu et al [21][22][23] deposited blocks of different mixture of IN625 and SS304L on SS304L substrate at laser power (P L ) of 1300 W and scanning speed (v) of 0.5 m/min using the LDED technique. They studied the influence of wire electro discharge machining (WEDM) on deposited blocks, 21 influence of substrate on different gradient 22 and material characterization of deposited blocks.…”

“…They studied the influence of wire electro discharge machining (WEDM) on deposited blocks, 21 influence of substrate on different gradient 22 and material characterization of deposited blocks. 23 It is observed from the literature that there is a lack of proper investigation of parametric effect for the development of SS304L-IN625 FGM using LDED. Thus, the main objective of this paper is to study the effect of LDED parameters on the deposition of the FGM wall.…”

Recent progress in process, structure, properties, and performance in additive manufacturing

“…This special issue includes all aforementioned trends of progress through 19 original research articles [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The editors of STWJ invited active researchers from the AM and welding communities to contribute to this special issue.…”