Microstructural and thermal stability of selective laser melted 316l stainless steel single tracks
| Autor: | Gunnel Fredriksson, I. Yadroitsava, Igor Yadroitsev, Pavel Krakhmalev |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
lcsh:T55.4-60.8 residual stress 02 engineering and technology engineering.material 01 natural sciences Industrial and Manufacturing Engineering law.invention Residual stress law 0103 physical sciences lcsh:Industrial engineering. Management engineering Thermal stability Austenitic stainless steel Selective laser melting stainless steel 010302 applied physics Drop (liquid) Metallurgy 021001 nanoscience & nanotechnology Microstructure Laser tracks selective laser melting engineering 0210 nano-technology |
| Zdroj: | South African Journal of Industrial Engineering, Volume: 28, Issue: 1, Pages: 12-19, Published: MAY 2017 South African Journal of Industrial Engineering, Vol 28, Iss 1, Pp 12-19 (2017) |
| Popis: | To remove residual stresses, an as-built SLM object is usually post-treated. This treatment can affect the microstructure, changing the final mechanical characteristics. This investigation is focused on the microstructural characterisation of 316L austenitic stainless steel in as-built and annealed conditions. The SLM microstructure was relatively stable up to 900°C, when cell boundaries start to disappear. At higher temperatures, an insignificant grain coarsening was detected. These microstructural changes caused a gradual drop in the hardness. The obtained result is background for the future development of post-treatment regimens to achieve a high level in the final mechanical properties of SLM objects. Om die res-spannings in 'n lasergesinterde metaalvoorwerp te verwyder, word die voorwerp gewoonlik na die tyd behandel. Hierdie behandeling kan die mikrostruktuur beïnvloed, wat kan lei tot n verandering in die meganiese eienskappe. Hierdie ondersoek fokus op die mikrostruktuur karakterisering van 316L austenitiese vlekvrye staal in die soos-vervaardige en uitgegloeide toestande. Die lasergesinterde metaal mikrostruktuur was relatief stabiel tot 900°C, waarna alle selgrense begin verdwyn het. By hoër temperature is onbeduidende grein vergrowwing bespeur. Hierdie mikrostruktuur veranderinge veroorsaak 'n geleidelike afname in die hardheid van die voorwerp. Dié resultaat skep die basis vir verdere ontwikkeling van die behandeling skedules om 'n hoë vlak in die finale meganiese eienskappe van lasergesinterde metaalvoorwerpe te verkry. |
| Databáze: | OpenAIRE |
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