Parametric analysis of SLM using comprehensive optical monitoring. Issue 1 (18th January 2016)

• Record Type: Journal Article
• Authors: Doubenskaia, Maria; Grigoriev, Sergey; Zhirnov, Ivan; Smurov, Igor
• Is Part Of: Rapid prototyping journal. Volume 22:Issue 1(2016)
• Page Start: 40
• Page End: 50
• Publication Date: 2016-01-18
• Subjects: Selective laser melting -- CCD-camera -- Optical monitoring -- Pyrometer -- Temperature measurements -- Thermal emission; Engineering design -- Periodicals; 620.004205
• DOI: 10.1108/RPJ-04-2014-0046
• Languages: English
• ISSNs: 1355-2546

Abstract

Abstract : Purpose: – This paper aims to propose methods for on-line monitoring and process quality assurance of Selective Laser Melting (SLM) technology as a competitive advantage to enhance its implementation into modern manufacturing industry. Design/methodology/approach: – Monitoring of thermal emission from the laser impact zone was carried out by an originally developed pyrometer and a charge-coupled device (CCD) camera which were integrated with the optical system of the PHENIX PM-100 machine. Experiments are performed with variation of the basic process parameters such as powder layer thickness (0-120 μm), hatch distance (60-1, 000 μm) and fabrication strategy (the so-called "one-zone" and "two-zone"). Findings: – The pyrometer signal from the laser impact zone and the 2D temperature mapping from HAZ are rather sensible to variation of high-temperature phenomena during powder consolidation imposed by variation of the operational parameters. Research limitations/implications: – Pyrometer measurements are in arbitrary units. This limitation is due to the difficulty to integrate diagnostic tools into the optical system of a commercial SLM machine. Practical implications: – Enhancement of SLM process stability and efficiency through comprehensive optical diagnostics and on-line control. Originality/value: – High-temperature phenomena in SLM were monitored coaxially with the laser beam for variation of several operational parameters.