Conditions for Quality Dimensions in Direct Laser Melting of Copper

Abstract

This paper analyzes the effect of SLM parameters on mechanical characteristics and surface roughness of a single-component copper powder. The study reports on appropriate SLM conditions for a single-component copper powder; to form a layer a technique within layer-by-layer selective laser melting is suggested and comprises roughing, semi-finishing and finishing modes. The work establishes a range to vary surface roughness, porosity and ultimate compressive strength of a single-component copper powder by means of laser processing conditions. Rz is variable 332 to 689 μm, porosity ranges approximately 13-39%, and ultimate compressive strength is 8 to 104 МPа.

Problems and prospects of energy cooperation between Ukraine and Kazakhstan

“…The issues of energy cooperation between Ukraine and Kazakhstan remain not suffi ciently researched by both Ukrainian and Kazakh scientists. Certain aspects of fuel and energy interaction between countries were considered in the articles of such scholars as R. Opimach [1], N. Kuharskaya [2], V. Saprykin [3], M. Polyakova [4].…”