Open AccessThe effect of heat treatment on the structure and mechanical properties of additively manufactured stainless steels
Author(s) -
Г. Ф. Корзникова,
Vadim V. Smirnov,
Д. В. Гундеров,
R. R. Mulyukov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/672/1/012007
Subject(s) - materials science , ultimate tensile strength , austenite , annealing (glass) , residual stress , martensite , metallurgy , porosity , plasticity , composite material , microstructure
Selective laser sintering was applied for stainless steel samples additive manufacturing. It was found that in the as fabricated state, the samples consist of martensite and residual austenite, contained significant dislocation density and residual stresses. Additively manufactured samples had an ultrafine-grained structure with predominantly high angle grain boundaries and were free of crystallographic texture and residual porosity. The ultimate tensile strength of the as-built steel was 960 MPa. Annealing caused a decrease in residual austenite, but did not significantly affect the size and morphology of the grains. The ultimate strength after annealing increased markedly while maintaining plasticity.