热挤压过程中钢筒内Ni + Al粉末混合物的结构与相形成

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2023-06-21 DOI:10.3103/S1061386223020036
F. F. Galiev, V. D. Berbetcev, O. D. Boyarchenko, I. V. Saikov, A. E. Sytschev, M. I. Alymov
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引用次数: 0

摘要

研究了Ni + Al粉末在钢筒内热挤压过程中组织/相形成的阶段。结果表明,NiAl3、Ni2Al3和Ni3Al相的出现先于目标NiAl相的形成。结果表明,相组成在塑性变形开始前就已形成,并在挤压过程中保持不变;同时,组织发生变化,晶粒变形,呈细长状。发现HGE的特征是元素的再分配。可以认为,为了提高目标相产率,有必要补偿或消除元素的再分布。
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Structure and Phase Formation in Ni + Al Powder Mixture Enclosed in a Steel Cartridge during Hot Gas Extrusion

Stages of structure/phase formation in Ni + Al powder mixture enclosed in a steel cartridge in the course of hot gas extrusion (HGE) were studied. It was shown that the formation of target NiAl phase is preceded by the appearance of NiAl3, Ni2Al3, and Ni3Al phases. It was determined that the phase composition is formed prior to the onset of plastic deformation and retains constant in the course of extrusion process; meanwhile, the structure undergoes the changes, its grains are deformed, taking an elongated shape. It was found that HGE is characterized by a redistribution of elements. It can be assumed that to increase the target phase yield, it is necessary to compensate or eliminate the redistribution of elements.

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来源期刊
CiteScore
1.00
自引率
33.30%
发文量
27
期刊介绍: International Journal of Self-Propagating High-Temperature Synthesis  is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.
期刊最新文献
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