Investigation of plastic properties of AISI 316l steel by method of registration of macrolocalization fields

Selective laser melting is one of the modern methods manufacturing parts in production machine-building equipment, a special place occupied by complex technological processes used manufacture high-load units pneumatic-hydraulic system from heat-resistant alloys. The research was carried out on samples made powder material - stainless steel AISI 316L martensite class. Metallographic studies showed that density sample 99.83%, structure martensitic equilibrium constructed tracks. Tests to determine mechanical properties were performed accordance with ISO 6892 an INSTRON test machine. From tensile diagram it found yield strength 376.56 MPa, maximum point temporary resistance 615, 40 MPa 319 seconds after start test. control surface roughness using BioBase device. working area consisted two areas: 5 μm, which accounted for 80% part (zones A and Б) 20% (zone Б), 17 μm. According results microstructure method registration macrolocalization fields zone samples, destruction began microconcentrators due different roughness. It established subsurface layer increased comparison main body has smaller elongation 10.84%. microstructural gap, between zones Б. During Б, concentrators gap detected. As result study, change its mechanism deformation shown, scheme extraction tail sections tracks crack propagation conditions testing constructed.