Description: Because boron has been added to the weld filler metal to refine the weld grain structure and is a common impurity in Al, the poor weld and HAZ properties of the Al-stabilized alloys could have been caused by this B. This thermal cycling study showed that the precipitated phase was Ti B and the the B raised the BETA-transus. The phase relation of B in Ti6211 permits a plausible explanation for the toughness loss of ..cap alpha.. + BETA annealed alloys caused by welding and weld thermal cycles. The alloys with B contents under this solubility limit of 0.0018% B were unaffected. (DLC)
Date: January 1, 1984
Creator: Inouye, H. & David, S.A.
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