Grain boundary melting of hafnium containing Ni3Al intermetallic compounds
โ Scribed by Chang, T.T.; Chuang, T.H.
- Book ID
- 122007467
- Publisher
- Elsevier Science
- Year
- 1994
- Weight
- 658 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0956-716X
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A~~act-Ex~~ments at room temperature have established that the addition of 750ppm by weight (0.35at.%) of boron to stoichiomettic N&AI reduces the effectiveness with which grain boundaries strengthen the alloy. This effect leads to boron-induced weakening of the most finely grained aggregates (d S 1
63Ni self-diffusion along grain boundaries (GBs) in intermetallic alloys Ni-25.2A1, Ni-24.9A14.8W, Ni-24.2A14.7Cr, Ni-19.3A14.5Hf and Ni-27.6Al-4.9Co (at.%) has been investigated by the radiotracer technique. The usual darkening in the positions of GBs on the autoradiographs obtained on the parallel