IMPROVING THE WELDABILITY OF FeCrAl ALLOYS THROUGH TiC ADDITIONS

Sampling-based Optimization in the Presence of Uncertainty

计算机科学;物理学

J.N. DuPont ; K.D. Adams

PID  :  79880

学科分类：计算机科学（综合）

来源: CEUR

【 摘 要 】

FeCrAl alloys were prepared with TiC additions to act as hydrogen traps and improve resistanceto hydrogen cracking. Weldability results showed that alloys with up to 20 wt% Al and 11 wt%Cr could be prepared crackfree with relatively small TiC additions of ~ 4 wt%.Thermogravimetric analysis of Fe10Al5Cr corrosion coupons with and without TiC has shownthat the corrosion resistance is not significantly affected by the presence of the second phase.These results suggest that TiC can be used to decrease the hydrogen cracking susceptibility ofFeAlCr based alloys, which are candidates for use in weld overlay applications in coalfiredboiler tube fabrication. A solidification model was developed as an aid to control the TiC content