This paper presents a study of intergranular fracture in NiAl doped with boron and carbon. Room temperature compression tests were carried out at a strain rate of 3.3 x 10(-3)/s. Boron segregation was found to enhance grain boundary cohesion and reduce intergranular fracture. Also, poor grain boundary cohesion was found to be a major cause of brittle intergranular fracture.
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