Analysis of effects of fine nanoparticles and grain boundary character distribution on abnormal grain growth in friction stir welded material

细纳米颗粒及晶界特征分布对搅拌摩擦焊材料异常晶粒长大的影响分析

• 批准号: 20760502
• 负责人: HIRATA Tomotake
• 金额: $ 2.25万
• 依托单位: Industrial Research Institute of Osaka Prefecture
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20760502/
• 关键词: 結晶・組織制御; 粒界性格分布; 摩擦攪拌接合; 結晶粒径; 異常粒成長; 微細ナノ粒子; 動的再結晶; アルミニウム合金; マグネシウム合金

In the friction stir welded (FSW) material, the abnormal grain growth (AGG) often occurs in the microstructure of the weld zone during the post-FSW heat treatment. In this study, the influence of microstructural features on GG was investigated to prevent the AGG. The addition of fine nanoparticles was effective for preventing the AGG. And also it was considered to prevent GG by controlling the grain boundary character distribution by the optimization of welding condition. In addition, it was confirmed that the grain size can be controlled by adjusting the alloying element and the purity level. It is concluded that these results are very important to improve a reliability of FSWed material.

在搅拌摩擦焊（FSW）材料中，在焊后热处理过程中，焊缝区组织中经常出现异常晶粒长大（AGG）现象。在这项研究中，微观结构特征对GG的影响进行了研究，以防止AGG。纳米微粒的加入对防止AGG是有效的。同时还考虑了通过优化焊接工艺控制晶界特征分布来防止晶界开裂。此外，证实了可以通过调节合金元素和纯度水平来控制晶粒尺寸。这些结果对提高搅拌摩擦焊材料的可靠性具有重要意义。

项目成果

摩擦攪拌技術を利用したものづくり

使用搅拌摩擦技术制造

• 发表时间: 2008
• 作者: 平田智丈;森重大樹;田中努;平田智丈;平田智丈;平田智丈
• 通讯作者: 平田智丈

Influences of alloying elements on grain sizes in friction stir processed aluminum and aluminum alloys.

合金元素对搅拌摩擦加工铝和铝合金晶粒尺寸的影响。

• 发表时间: 2011
• 期刊: Proceedings of TMS 2011 annual meeting CD-ROM
• 作者: 平田智丈;森重大樹;辻川正人;東健司
• 通讯作者: 東健司

5052アルミニウム合金とAZ31マグネシウム合金の摩擦点接合

5052铝合金与AZ31镁合金的摩擦点连接

• 发表时间: 2008
• 作者: 平田智丈;森重大樹;田中努;平田智丈;平田智丈
• 通讯作者: 平田智丈

Comprehensive analysis of minimum grain size in pure aluminum using friction stir processing

• DOI: 10.1016/j.matlet.2010.06.003
• 发表时间: 2010-09
• 期刊: Materials Letters
• 影响因子: 3
• 作者: T. Morishige;T. Hirata;M. Tsujikawa;K. Higashi

Effect of Mg content on the minimum grain size of Al–Mg alloys obtained by friction stir processing

• DOI: 10.1016/j.scriptamat.2010.10.033
• 发表时间: 2011-02
• 期刊: Scripta Materialia
• 影响因子: 6
• 作者: T. Morishige;T. Hirata;T. Uesugi;Y. Takigawa;M. Tsujikawa;K. Higashi