540 Rafi dah Hasan et al. Procedia Engineering 10 2011 536–541
F su
4
p th
e s
th th
e c
h re
st a
S
F sh
T
Fig. 7. The EDS uspected due to c
4. Heat Treatm
A simple h properties of th
he resultant m elements has b
ealed within a he formation
he needle stru expected in T
contamination heat treatment
egions of wea truts are one
affect their stre SLM Ti-6Al-4
Fig. 8. a Schema howed balance
Į
1000°C emp°C
W q
540°C
plot of spectrum contamination
ment on SLM
heat treatment he struts. Fig
microstructure been redistrib
an evacuated q of
Į and ȕ reg ucture. Result
Ti-6Al-4V, w was below th
t has produced akness; howe
grain wide. T ength. Furthe
4V micro-lattic
atic of heat treatm ȕ phase of Ti-6A
Solution heat
treatment
Water quench
1 hour
Pre he
m 2 for elemental
M Ti-6Al-4V m
t process was 8a schemati
e, which is c uted. The hea
quartz tube. T gions, the rem
ts from EDS while no Cr
he detection l d a more uni
ever the heat The presence o
er analysis to u ce structure is
ment process on S Al-4V
4 hours
ecipitation at
treatment
l analysis of as-r
micro-strut
used to stud ically illustrat
closer to that at treatment w
The heat treatm moval of the c
analysis sho was detecte
limit of the E form structur
treatment has of a large grai
understand th s now being ca
SLM Ti-6Al-4V m
Timeh Air
cooled
received micro-st
dy how the m tes the heat tre
normally use was done in a
ment led to a s chromium and
owed that nor d throughout
EDS system. T e and is there
s not induced in size within
he heat treatme arried out.
micro-strut; b r
our
a trut showed the e
microstructure eatment proce
ed and in wh a normal furn
somewhat coa d iron rich reg
rmal amounts t the sample
This change i efore likely to
d significant g n such small st
ent effect on m
esulted microstru existence of Fe a
affected the m ess while Fig
hich any segr ace but with
arser microstru gions and the
of Fe were ed area, as t
in the micros o produce stru
grain growth truts would si
mechanical pr
ucture of heat trea and Cr peaks,
mechanical 8b shows
regation of the sample
ucture with removal of
present, as the overall
tructure on uts without
so that the ignificantly
roperties of
ated specimen
Rafi dah Hasan et al. Procedia Engineering 10 2011 536–541 541
5. Conclusion and Ongoing Study
