Wide gap braze repairs of nickel superalloy gas turbine components
The effect of microstructure and processing parameters on the bend properties of wide gap braze repairs has been investigated for BNi-2 and BNi-5 filler metals. BNi-2 braze alloys developed a brittle eutectic constituent that was the source for crack initiation and propagation. BNi-5 braze alloys developed large pores and lack of fusion to the base metal René 108 that decreased the strength of the joint. Three types of crack behaviors were observed within the two braze alloys. (1) Crack initiation and propagation through the brittle eutectic constituent. (2) Crack initiation and propagation ...
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