کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1601414 | 1005196 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microstructure and mechanical properties of Ni3Al fabricated by thermal explosion and hot extrusion Microstructure and mechanical properties of Ni3Al fabricated by thermal explosion and hot extrusion](/preview/png/1601414.png)
The dense Ni3Al with different boron and chromium addition was fabricated by the thermal explosion and hot extrusion (TE/HE) technology. Microstructure examination showed that Ni3Al contained fine grain structure (200 nm to 10 μm). Analysis of X-ray spectra as well as transmission electron microscopy studies revealed that three phases present in all alloys: γ-Ni, Ni3Al and dispersoids of Al2O3. With the addition of B, β-NiAl phase and twinned Ni3Al formed, but in the B and Cr doped alloy, Cr rich phase and a spot of Cr7Ni3 particles with stacking faults inside were observed. In addition, dislocations with high density existed in all alloys. The mechanical test showed that the B and Cr addition resulted in significant improvement in mechanical properties, and TE/HE synthesized Ni3Al alloy owned more excellent mechanical properties, compared with the one synthesized by combustion.
Journal: Intermetallics - Volume 17, Issue 7, July 2009, Pages 572–577