A survey of eutectoid decomposition in ten Ti-X systems
A survey of eutectoid decomposition in ten Ti-X systems
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DOI：
10.1007/bf02661947
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发表时间：
1978-11
期刊：
影响因子：
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通讯作者：
G. W. Franti;J. .. Williams;H. Aaronson
中科院分区：
文献类型：
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作者：
G. W. Franti;J. .. Williams;H. Aaronson
本文研究了10个Ti-X二元系（X依次为Bi、Co、Cr、Cu、Fe、Mn、Ni、Pb、Pd和Pt）的共析分解机理。在亚共析合金中，贝氏体反应（在本文中定义为金属间化合物颗粒在先共析体a中的非层状分散）在所有研究的合金中占主导地位，但Ti-Cu合金除外，其中形成贝氏体和珠光体。在近共析成分的合金中，珠光体在某些系统中是主要产物，而贝氏体在其它系统中是主要产物。这些结果基本上与反应温度无关。它们与Fe-C合金中的类似组织有很大的不同。在Fe-C合金中，珠光体是高温下形成的主要共析组织，而贝氏体在低温下起此作用。Ti-X合金和Fe-C合金行为之间的差异可以用Ti-X合金中比Fe-C合金中更明显的先共析α板形成趋势来解释，并且根据Hillert的理论，需要无序的相间边界来发展导致珠光体演变的合作生长模式。
The mechanism of eutectoid decomposition in ten Ti-X binary systems, wherein X was successively Bi, Co, Cr, Cu, Fe, Mn, Ni, Pb, Pd and Pt, has been investigated. In hypo-eutectoid alloys, the bainite reaction (defined in the present context as a nonlamellar dispersion of intermetallic compound particles amongst proeutectoid a) predominated in all alloys studied but Ti-Cu, where both bainite and pear lite were formed. In alloys of near eutectoid composition pearlite was the dominant product in some systems and bainite was in others. These results are essentially independent of reaction temperature. They are quite different from analogous ones in Fe-C alloys, where pearlite is the principal eutectoid structure formed at high temperatures and bainite plays this role at low tem-peratures. The difference between the Ti-X and Fe-C behaviors was explained in terms of the much more pronounced tendency for proeutectoid α plate formation in Ti-X than in Fe-C alloys and, on a theory due to Hillert, of the need for disordered interphase boundaries in order to develop the cooperative growth mode that leads to the evolution of pearlite.