Structural and mechanical characterization of electron beam additive manufactured stainless steel samples has been carried out. The XRD measured austenite and ferrite lattice parameters showed their sensitivity to the heat input value, which was related to the chromium atom redistribution. The ferrite content depended on the heat input too. Optimal heat input level has been detected, which allowed obtaining the tensile strength higher than that of the base stainless steel. Residual strain levels in the as-deposited metal and fusion line zone have been measured using the X-ray sin2ψ method. The highest tensile residual strain was determined in a fusion line zone between the first as-deposited layer and a substrate. The microstructure of the first fusion line zone contained deformation twins and entangled dislocations generated by plastic flow under thermal expansion-contraction cycles.
|Журнал||International Journal of Advanced Manufacturing Technology|
|Состояние||Опубликовано - 1 дек 2018|
ASJC Scopus subject areas
- Control and Systems Engineering
- Mechanical Engineering
- Computer Science Applications
- Industrial and Manufacturing Engineering