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首页> 外文期刊>Philosophical Magazine Letters >Precipitate characteristics and selected area diffraction patterns of the β′ and Q′ precipitates in Al-Mg-Si-Cu alloys
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Precipitate characteristics and selected area diffraction patterns of the β′ and Q′ precipitates in Al-Mg-Si-Cu alloys

机译：Al-Mg-Si-Cu合金中的α和Qα沉淀物的沉淀特征和选定的区域衍射图案

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摘要

In this study, the precipitate characteristics and selected area diffraction patterns (SADP) of the β ′ and Q ′ precipitates formed at the over-aged state of Al-Mg-Si-Cu alloys are systematically investigated by means of high-resolution transmission electron microscopy and transition matrix. The β ′ precipitates have two cross-sections, rectangle-shaped and round-shaped aligned with [0 0 1]Al direction, but only rectangle-shaped cross-section exists for Q ′ precipitates. And, both of them have 12 variants and orientations with Al matrix. However, there are only three different zone axes, [0 0 0 1]β ′, [1 4 5 0]β ′, and [5 4 1 0]β ′ for β ′ precipitates, and [0 0 0 1]Q ′, [1 4 5 0]Q ′, and [3 2 1 0]Q ′ for Q ′ precipitates, parallel to the [0 0 1]Al direction when they are precipitated from the Al matrix, respectively. Then, a new [0 0 1]Al SADP model, which superposes diffraction patterns of the β ′ and Q ′ precipitates, is established. Furthermore, some “cross-shaped” diffraction streaks appeared at over-aged state can be explained reasonably by this model, which is good in agreement with the experimental data.View full textDownload full textKeywordsaluminum alloys, high-resolution transmission electron microscopy, precipitation, electron diffraction, age-hardeningRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/09500839.2010.541165
机译：在这项研究中，系统地研究了在Al-Mg-Si-Cu合金的过时状态下形成的β-和Q-β析出物的析出物特征和选定的区域衍射图案（SADP）。通过高分辨率的透射电子显微镜和过渡矩阵。 β沉淀具有两个横截面，矩形和圆形与[0 0 0 1] Al的方向对齐，但只有矩形横截面存在Q沉淀物。并且，它们都具有12个带有Al矩阵的变体和方向。但是，只有三个不同的区域轴，[0×0×0×1] β→β，[1×4×5×0] β和sub的[5 4×1×0] βâ€对于β沉淀，和[0 0 0欧元[0欧元1] Q欧元，[1欧元4欧元5欧元0] Q欧元，和[3 2 1×0] Qâ€Qâ沉淀，平行于[0 0 0 1] Al <它们分别从Al基体中析出时的方向。然后，建立了一个新的[0 0 0 1] Al SADP模型，它叠加了β和Q沉淀物的衍射图样。此外，该模型可以合理地解释一些在过时效状态下出现的``十字形''衍射条纹，这与实验数据相吻合。查看全文下载全文关键词铝合金，高分辨率透射电子显微镜，降水，电子衍射，时效硬化相关var addthis_config = {ui_cobrand：“泰勒和弗朗西斯在线”，servicescompact：“ citlikelike，netvibes，twitter，technorati，delicious，linkedin，facebook，stumbleupon，digg，google，更多”，pubid： “ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/09500839.2010.541165

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