Stan R. Seagle

RMI Company — U.S.A.
TITANIUM TECHNOLOGY FORECAST
l - INTRQD ]; TIQN

Titanium usage continues to grow being spurred by an expanding

commercia al aerospace indu ustry an ncr ased requiremen nts

non- space applications Currently, on—ae space usage is
approximately 0% f SA c nsumption The ap1d gr th rate of
t segment suggests tha t onfae sp ce u age f

titanium will be a larger portion of total market in the 1990s.

High specific strength (strength/density) to 1000 E‘ is the ke
property utilized in applying itanium allo 5 in aerospace
' I n ' o

applica ons n on—aerospace s ium's ex ellent
corr051on re51stance is often the cr1t1cal, and m t important
characteris s two proper 1es, sp ic st e h d
corrosion resistance, differentiate titanium fro om other

materials and account for nearly all the titanium applications.

Titanium, a relatively new commercial metal, has demonstrated

excellent performance in aerospace to moderately eleva ted

temperatures and outstanding corrosion resis ance in neutral
' id A i

and mi ci y ac1d1c chlor e environments s we move nto th
90s, new titanium al are expect d to be used at higher
temperatures, at h her strength levels an 1n ore aggressive
env1ronm a n, the tu bi ind str 1
re e cont nually 1 proved q t enha ce bo

y to th
performance and safety. Specific background on these expected
advances in alloy and process technology are discussed below.

2 , HIGH TEMPERATURE ALLOYS

Fi ure l contains elevated temperature stress—rupture data on

the os ad (i co a al oy an use ed extensivesly in the
U.S.A for the hi 1gh temperature compressor portion of
turbines

The maximum design temperature for this alloy is about 1000 F.
More recen ly, the temperature capability of tita anium has be

I I Engl and T1—1 00 by 1 in 1834 s
being in o est quantit in new Rol Roy n in s
while the Ti 1100 is being evaluate U S A eng1n p oducers

pote 1al use e a lications temperature ex e ds
about 1050 to , rcfa oxid tion of tita iu alloy

0 su
ecomes to develop suitable coeatings that could be used with