Novel Processing Techniques for γ-TiAl Alloys
نویسندگان
چکیده
منابع مشابه
Synthesis of Nano - Crystalline Γ - Tial Materials
One of the principal problems with nano-crystalline materials is producing them in quantities and sizes large enough for valid mechanical property evaluation. The purpose of this study was to explore an innovative method for producing nano-crystalline γ-TiAl bulk materials using high energy ball milling and brief secondary processes. Nano-crystalline powder feedstock was produced using a Fritsc...
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Intermetallic TiAl-based alloys represent an important class of high temperature structural materials providing a unique set of physical and mechanical properties that can lead to substantial payoffs in aircraft engines, industrial gas turbines and automotive industry. The present status and future perspectives of TiAl-based alloys are reviewed from the point of view of alloy design, processing...
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The behavior of jogged screw dislocations in y-TiAl alloys has been investigated with large-scale molecular dynamics (MD) simuIations. We find a new mechanism for formation of pinning points in jogged screw dislocations. We also find that the critical height for the jogs in the +[i10] directions on the (001) plane to move nonconservatively is between 3ro and 4r0, where ro is the nearest neighbo...
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This article gives a brief description of the use of diffraction contrast transmission electron microscopy for characterizing the deformation microstructure. The capabilities and limitations of different modes of microscopy are also discussed. One of strengths of transmission electron microscopy technique is its capability to identify uncommon deformation system. This is illustrated by the anal...
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In two-phase TiAl-based alloys, the coexisting 2 and phases exhibit a thermal expansion mismatch, so that increased creep rates during thermal cycling may be expected. Creep deformation of two g-TiAl-based alloys was investigated during thermal cycles between 900 and 300 or 350 C with applied tensile stresses of 32.5 or 37.0 MPa. Measured thermal cycling creep rates were compared with isotherma...
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ژورنال
عنوان ژورنال: Materials Science Forum
سال: 2011
ISSN: 1662-9752
DOI: 10.4028/www.scientific.net/msf.690.145