Severe plastic deformation and phase transformations
Severe plastic deformation and phase transformations
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严重的塑性变形和相变
DOI：
10.1088/1742-6596/240/1/012003
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
X. Quelennec
中科院分区：
文献类型：
--
作者：
X. Sauvage;A. Chbihi;X. Quelennec
在严重变形的金属合金中产生大密度的晶体缺陷，使系统远离热力学平衡。因此，应变诱导相变可能发生，并影响力学性能，如众所周知的轨道表面的白色蚀刻层。本文简要介绍了文献中报道的固态非晶化、过饱和固溶体、沉淀溶解和无序化等现象。还讨论了时效前剧烈塑性变形导致的纳米结构金属合金的相分离和析出。
Large densities of crystalline defects are created in severely deformed metallic alloys, pushing systems far from the thermodynamic equilibrium. Thus, strain induced phase transformations may occur and affect the mechanical properties like in the well known white etching layer on the surface of rail tracks. Here we briefly report about different phenomena reported in the literature such as solid state amorphization, super saturated solid solutions, precipitate dissolution and disordering. Phase separation and precipitation in nanostructured metallic alloys by severe plastic deformation prior to aging are also discussed.