Effect of martensitic phase transformation on the ductility of polycrystalline YCu
Effect of martensitic phase transformation on the ductility of polycrystalline YCu
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马氏体相变对多晶YCu延展性的影响
DOI:
10.1016/j.scriptamat.2011.07.030
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发表时间:
2011
影响因子:
6
通讯作者:
Skrotzki
中科院分区:
文献类型:
--
作者:
Oertel;Schaarschuch;Freudenberger;Brokmeier;Skrotzki
The tensile deformation behaviour of an extruded, polycrystalline YCu intermetallic compound was investigated from room temperature down to 77K. A stress-induced martensitic transformation of the cubic B2 to the orthorhombic B27 phase was observed. The increasing amount of B27 phase with decreasing temperature leads to a decrease in ductility. A drastic decrease sets in at about 160K when thermally induced martensite is formed, characterizing the brittle-to-ductile transition of YCu. Reasons for the relatively high ductility above 160K are discussed.
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