Effect of heat treatment on the corrosion resistance and mechanical properties of selective laser melting Ti6Al4V alloy

The present work shows that the effect of several heat treatments on the corrosion resistance and mechanical properties of Ti6Al4V processed by selective laser melting (SLM). The microstructure of Ti6Al4V alloy produced by selective laser melting exhibited bulky prior β columnar grains, and a large...

Full description

Saved in:
Bibliographic Details
Published in:Materialwissenschaft und Werkstofftechnik 2021-12, Vol.52 (12), p.1319-1327
Main Authors: Sui, A.Q., Liu, B.J., Liu, C.H., Wang, D.S., Wang, E.L.
Format: Article
Language:English
Subjects:
Corrosion effects
Corrosion resistance
Corrosion tests
Electrochemical corrosion
Grain size
Heat treatment
Korrosionsbeständigkeit
Laser beam melting
Lasers
Mechanical properties
mechanische Eigenschaften
Rapid prototyping
Selective laser melting
Selektives Laserstrahlschmelzen
Strain
Ti6Al4V
Titanium base alloys
Wärmebehandlung
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The present work shows that the effect of several heat treatments on the corrosion resistance and mechanical properties of Ti6Al4V processed by selective laser melting (SLM). The microstructure of Ti6Al4V alloy produced by selective laser melting exhibited bulky prior β columnar grains, and a large amount of fine acicular martensites α′ were observed inside the prior β columnar grains. The acicular martensitic α′ were transformed to a mixture of α and β after heat treatment, and the grain size increases with the increase of heat‐treated temperature. The results of 3.5 wt% NaCl solution electrochemical corrosion test showed that the heat‐treated samples possess a higher corrosion resistance than the as‐received sample. Among of them, the sample after heat‐treated at 730 °C exhibited best corrosion resistance and excellent fracture strain. The sample heat treated at 1015 °C showed worst mechanical properties due to the formation of Widmanstätten structure. The high density Ti6Al4V alloy was successfully produced by selective laser melting (SLM). The microstructure transformed into a α+β mixture after heat‐treated. Improved corrosion resistance of heat‐treated SLM‐produced Ti6Al4V alloy samples were obtained. The heat‐treated sample at 730 °C exhibited excellent corrosion resistance and plastic.
ISSN:0933-5137
1521-4052
DOI:10.1002/mawe.202100201