Some Considerations Regarding Micro Hardness of Parts Manufactured from 316-L Steel Using SLM Technology

Abstract

In this paper is investigated the effect of building parts with different layer sizes using an additive manufacturing technique, from the statistical point of view. The paper is focused on the differences that appear at the stainless steel parts when the building layer is increased, this being done on the SLM 250 HL machine. This machine uses a fiber laser to melt fine powder on a layer-by-layer basis to create three-dimensional metallic parts from CAD files. The samples were constructed using two different layer thicknesses and then reprocess so that a micro hardness test could be employed. The micro hardness’s are compared using statistical methods. Overall, the obtained results indicate that the outcome influences the manufacturing strategy that it is chosen.

Compressive Behaviour of Lattice Structures Manufactured by Polyjet Technologies

“…Furthermore, several studies have been examined the influence of the metal powder layer thickness on the internal structure and the micro-hardness of the SLM steel parts. Buican [20] investigated the effect of building stainless steel parts, with different layer sizes and compared the micro hardness of three-dimensional metallic parts, obtained by using a laser beam that melts fine powder on a layer-by-layer basis [21].…”

Sifat Mekanis dan Struktur Mikro pada Sambungan Las Gesek Baja SCM415H untuk Aplikasi Poros Roda Belakang

“…Beban yang diterapkan pada indentor adalah sebesar 0.3 kgf. Perhitungan nilai kekerasan mengacu pada persamaan dalam penelitian yang dilakukan oleh Buican et al [11]. Gambar 2 menunjukkan posisi indentor yang dilakukan pada pengujian kekerasan Vickers terhadap spesimen hasil las gesek.…”

Study on SLM manufacturing of teeth used for dental tools testing

“…due to the subsequent melting and cooling cycles [4][5][8][9][10][11]. These melting and cooling cycles are due to the way the technology works.…”

“…Furthermore, the positioning solution influences the mechanical properties and the residual stresses of the finished part, and many other parameters. Effects which are influenced by the part positioning solution are [8][9][10][11]: • outer surface of the finished part (including the roughness);…”