弹性应力对Al-Cu合金中析出相的作用及模型

发布时间：2018-01-13 19:19

本文关键词：弹性应力对Al-Cu合金中析出相的作用及模型　出处：《稀有金属材料与工程》2016年12期 　论文类型：期刊论文

更多相关文章： Al-Cu合金 应力位向效应 析出相 模型

【摘要】：Al-Cu合金中析出相有3种变体,以前的研究大都假设在外力作用下析出相平行或垂直于外加应力方向,而实际析出相与外力可能存在一定的角度,因此建立了一个新的模型,将析出相与力的夹角考虑在内,通过此模型能便捷地判断出析出相是否存在应力位向效应。采用透射电子显微镜(TEM)、扫描透射电镜(STEM)对Al-4Cu合金在外力作用下时效后的析出相进行分析。结果表明,析出相GP区和θ″相存在应力位向效应。采用所建的模型分析合金中析出相在外力作用下的应力位向效应,此模型可简捷方便地判断合金中析出相在外力作用下的析出行为。
[Abstract]:There are three variants of precipitated phase in Al-Cu alloy. Most previous studies have assumed that the precipitated phase is parallel or perpendicular to the direction of external stress under the action of external force, but there may be some angle between the actual precipitated phase and the external force. Therefore, a new model is established, which takes into account the angle between the precipitate phase and the force, and the stress potential effect of the precipitated phase can be easily determined by this model. Transmission electron microscopy (TEM) is used. The precipitation phase of Al-4Cu alloy aged under external force was analyzed by scanning transmission electron microscope (SEM). The stress potential effect exists in GP region and 胃 "phase of precipitated phase. The stress potential effect of precipitated phase in alloy under external force is analyzed by using the model established in this paper. The model can be used to determine the precipitation behavior of precipitated phase in alloy under external force.
【作者单位】：东北大学秦皇岛分校;
【基金】：中央高校基本科研业务费(N120323001)
【分类号】：TG146.21
【正文快照】： Al-Cu合金中析出相的析出序列为GP区→θ″→θ′→θ相,与基体的位向关系为{100}θ//{100}Al。在铝基体的1个{100}晶面上会形成3个变体,一般情况下这些变体是等量分布的,但在外加弹性应力作用下会发生变化。Eto[1]最先发现外力作用下Al-Cu合金中析出相的择优取向分布现象,称

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