Abstract: The tensile and
stress-rupture properties of Ni3Al alloys containing various
boron contents at 800℃and 850℃ have been studied. The results
show that the tensile strength and rupture life can be improved
by adding 0.52 to 1.37 at%B to Ni3Al, so do the tensile and
rupture ductiles. The effect of boron is the most obvious when
the alloy contains 1.37 at%B. If boron addition is too high,
there are boride eutectic pricipitating in grains and at grain
boundaries and the mechanical properties were severely degraded.
Key words:
Intermetallic compound Ni3Al alloy Effect of boron High temperature mechanical properties
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