Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation
An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size Ø13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at %) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grai...
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| Veröffentlicht in: | Physics of metals and metallography 2010-04, Vol.109 (4), p.369-375 |
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| container_title | Physics of metals and metallography |
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| creator | Imayev, V. M. Oleneva, T. I. Khismatullin, T. G. Imayev, R. M. Valiev, R. Fecht, H. -J. |
| description | An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size Ø13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at %) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grained as-cast structure of these alloys can be refined using massive transformation without the use of a labor-consuming procedure of hot working. The method proposed is efficient for the alloys containing alloying elements that retard diffusion in the alloys, which makes it possible to obtain massive
γ
m
phase at moderate cooling rates. It is shown by X-ray diffraction that the massive
γ
m
phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging. |
| doi_str_mv | 10.1134/S0031918X10040101 |
| format | Article |
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γ
m
phase at moderate cooling rates. It is shown by X-ray diffraction that the massive
γ
m
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γ
m
phase at moderate cooling rates. It is shown by X-ray diffraction that the massive
γ
m
phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging.</description><subject>Alloys</subject><subject>Chemistry and Materials Science</subject><subject>Degassing of metals</subject><subject>Diffraction</subject><subject>Diffusion</subject><subject>Hot working</subject><subject>Ingots</subject><subject>Intermetallic compounds</subject><subject>Materials Science</subject><subject>Metallic Materials</subject><subject>Metals</subject><subject>Phase Transformations</subject><subject>Specialty metals industry</subject><subject>Structure</subject><subject>Titanium base alloys</subject><subject>Transformations</subject><subject>X-rays</subject><issn>0031-918X</issn><issn>1555-6190</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp1UUFLHTEQDqWFvlp_gLfQUy-rySbZbI4PsSqIHvoEb0t2d_KM7CY2yWvRY3-5s7yCoDSBTL583zdMZgg54uyYcyFPfjImuOHtHWdMMs74B7LiSqmq4YZ9JKuFrhb-M_mS8wOKpGzEivw9T9YHmsD5ADOEQhHl2U5Tlf0zINrGkml0eCuQZihI-YHiGZ8y3fhKNuupaq97asP4ijeW_vHlnpZ7oLsMSwJLZ5uz_w20JBuyi2m2xcfwlXxydspw-C8ekNsfZ5vTi-rq5vzydH1VDaLVpbKjhFpqPRjDuNHMSq5H1UjTKl3XrhbGuBGUMD0zvQOutHK16vtmUIYxZ8QB-b7P-5jirx3k0s0-DzBNNkDc5Y6LRnFcapF-eyN9iLsUsLqu1dhmpXWDouO9aGsn6HxwEf814B5h9kMM2FJ8XwuFFQqtBBr43jCkmDO2vHtMfrbpqeOsW6bYvZsieuq9J6M2bCG9VvJ_0wv44Jx4</recordid><startdate>20100401</startdate><enddate>20100401</enddate><creator>Imayev, V. 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M.</au><au>Oleneva, T. I.</au><au>Khismatullin, T. G.</au><au>Imayev, R. M.</au><au>Valiev, R.</au><au>Fecht, H. -J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation</atitle><jtitle>Physics of metals and metallography</jtitle><stitle>Phys. Metals Metallogr</stitle><date>2010-04-01</date><risdate>2010</risdate><volume>109</volume><issue>4</issue><spage>369</spage><epage>375</epage><pages>369-375</pages><issn>0031-918X</issn><eissn>1555-6190</eissn><abstract>An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size Ø13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at %) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grained as-cast structure of these alloys can be refined using massive transformation without the use of a labor-consuming procedure of hot working. The method proposed is efficient for the alloys containing alloying elements that retard diffusion in the alloys, which makes it possible to obtain massive
γ
m
phase at moderate cooling rates. It is shown by X-ray diffraction that the massive
γ
m
phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging.</abstract><cop>Dordrecht</cop><pub>SP MAIK Nauka/Interperiodica</pub><doi>10.1134/S0031918X10040101</doi><tpages>7</tpages></addata></record> |
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| subjects | Alloys Chemistry and Materials Science Degassing of metals Diffraction Diffusion Hot working Ingots Intermetallic compounds Materials Science Metallic Materials Metals Phase Transformations Specialty metals industry Structure Titanium base alloys Transformations X-rays |
| title | Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation |
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