Effect of process parameters on microstructures and properties of Al–42Si alloy fabricated by selective laser melting

Electron Microscopy Study of Structural Defects Formed in Additively Manufactured AlSi10Mg Alloy Processed by Equal Channel Angular Pressing

“…In SLM process, a spherical metal powder is scattered on a building platform and then melted by a laser beam along a fixed 2D route [2,3]. Due to several rapid melting and solidification processes that increase the number of nucleation sites, the resulting microstructure of SLM parts is finer than that of their cast counterparts [4]. It was revealed that the microstructure of SLM-processed alloys consists of sub-micrometre cells with dense dislocations [5], which are essentially metastable, making the 3D printed alloys heterostructured materials [6].…”

Investigating the relationship between mechanical properties and residual stress in the laser cladding process of Inconel 625 superalloy

“…Appropriate heat treatment can release stresses. However, the deformation created during the cladding process may lead to incompatibility with the desired geometry and even deteriorate the uniformity of the product or generally, the quality of the cladding [ [1] , [2] , [3] ].…”

“…In the laser cladding process, due to the input heat, a high-temperature gradient is created. During the cooling, these gradients, coupled with different material properties, lead to different thermal contractions, and consequently, high residual stresses can be found in the cladding layers [ [1] , [2] , [3] ]. When the tensile residual stresses in the deposited layers are high, the formation of cracks are almost guaranteed.…”

Predictive model to design for high cycle fatigue of stainless steels produced by metal additive manufacturing

“…There are numerous AM process variables, e.g., beam parameters [ 1 , 2 , 3 ], scanning parameters (pattern, speed, power) [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ], powder characteristics and distribution [ 11 , 12 , 13 ], which can induce internal defects and largely affect the surface roughness. For example, Yang et al.…”