Formation Mechanism of Non-Equilibrium Phases during Bulk Mechanical Alloying by Accumulative Roll Bonding Process

累积滚焊过程块体机械合金化过程中非平衡相的形成机制

• 批准号: 17360355
• 负责人: TSUJI Nobuhiro
• 金额: $ 9.92万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360355/
• 关键词: Zr-Cu; Al-Fe; ARB; mechanical alloying; supersaturated solid solution; severe plastic deformation; amorphous; intermetallic compound; ナノコンポジット; 界面; アルミニウム; 鉄

Mechanical alloying (MA) of bulky sheet materials was tried by means of accumulative roll bonding (ARB). The MA by ARB made it possible to fabricate the bulky samples processed to various strain levels under well-controlled process conditions, such as temperature and strain rate, which enabled us to observe the microstructure and phase transition as a function of strain. The structure and composition of the obtained specimens were analyzed in nano-meter scale.The multilayered stacks of Cu+Zr and Fe+Al were deformed by the ARB process. Cu-Zr is a well-known amorphous formation system, while it has been thought that no amorphous phase can be obtained in Fe-Al system. In case of Zr+Cu multilayer, not only microstructural mixture but also atomistic level of micture were confirmed above 6 cycles ARB, so that supersaturated solid solution was obtained. It was also found that amorphous phase formed at interface regions between Cu and Zr. It was a surprising result since the severe plastic deformation (ARB) was conducted at ambient temperature in the present study. Nano-beam EDS analysis for the nano-lamellar structures clarified that a certain level of atomistic mixture is necessary for amorphous formation. During a heat treatment of the ARB sample, solid state amorphization proceeded to form the bulky composites of amorphous and nanocrystals. Atomistic mixture by ARB also proceeded in Fe-Al system, and supersaturated solid solution was obtained as well. However, amorphous phase was hardely observed in Fe-Al system. Only in the limited interface regiuons, small amount of amorphous was found. It was also clarified that the amorphous phase was formed via intermetallic compound.The present study indicated the potential of bulk mechanical alloying by the use of the ARB process and pointed out the importance of severe plastic deformation as well as the importance of interfaces for mechanical alloying reactions.

通过累积滚动粘结（ARB）尝试了笨重的材料的机械合金（MA）。 ARB的MA使得在良好控制的过程条件下（例如温度和应变速率）在诸如温度和应变速率之类的各种应变水平上制造庞大的样品成为可能，这使我们能够观察微结构和相变是应变的函数。分析了所获得的样品的结构和组成，分析了纳米米量表。Cu+Zr和Fe+Al的多层堆栈通过ARB过程变形。 Cu-ZR是一种众所周知的无定形形成系统，而人们认为在FE-AL系统中无法获得非晶相。在ZR+Cu多层的情况下，不仅在6个周期ARB以上确认了微结构混合物，而且还确认了原子尿素的原子水平，因此获得了过饱和的固体溶液。还发现在Cu和Zr之间的界面区域形成无定形相。这是一个令人惊讶的结果，因为在本研究中在环境温度下进行了严重的塑性变形（ARB）。纳米叶片结构的纳米梁EDS分析阐明了一定水平的原子混合物对于无定形形成是必要的。在对ARB样品的热处理过程中，固态无形化开始形成无定形和纳米晶体的庞大复合材​​料。 ARB的原子混合物也在FE-AL系统中进行，并且也获得了过饱和的固体溶液。但是，在FE-AL系统中几乎观察到了无定形相。只有在有限的界面区域中，发现了少量的无定形。还可以澄清的是，无定形相是通过金属间化合物形成的。目前的研究表明，通过使用ARB工艺来表明大量机械合金的潜力，并指出了严重的塑性变形的重要性以及机械合金的接口的重要性反应。

项目成果

ナノマテリアル工学大系 第2巻ナノ金属編

纳米材料工程系列第2卷纳米金属版

• 发表时间: 2006
• 作者: Y.Minamino;Y.Koisumi;N.Tsuji;N.Hirohata;K.Mizuuchi;Y.Ohkanda;N.Tsuji(分担);N.Tsuji;辻 伸泰
• 通讯作者: 辻 伸泰

Internal Stress Field in Ultrafine Grained Aluminum Fabricated by Accumulative Roll-Bonding

累积滚压超细晶粒铝的内应力场

• 发表时间: 2006
• 期刊: Mater. Sci. Forum 512
• 作者: R.Ueji;J.Taniguchi;N.Sumida;K.Tanaka;N.Tsuji
• 通讯作者: N.Tsuji

Formation of Ultrafine Grained Structures in Structural Metallic Materials by Severe Plastic Deformation

通过剧烈塑性变形在结构金属材料中形成超细晶粒结构

• 发表时间: 2005
• 期刊: J. of Jpn.Soc.Welding vol.74
• 作者: Y.Minamino;Y.Koizumi;N.Tsuji;N.Hirohata;K.Mizuuchi;Y.Ohkanda;N.Tsuji
• 通讯作者: N.Tsuji

Quantification of Annealed Microstructures in ARB Processed Aluminu

ARB 加工铝中退火微观结构的量化

• 发表时间: 2006
• 期刊: Acta Mater 54, No.11
• 作者: N.Kamikawa;N.Tsuji;X.Huang;N.Hansen
• 通讯作者: N.Hansen

SEVERE PLASTIC DEFORMATION : Towards Bulk Production of Nanostructured Materials

严重塑性变形：走向纳米结构材料的批量生产

• 发表时间: 2006
• 期刊: NOVA Science Publishers
• 作者: B.L.Li;N.Tsuji;N.Kamikawa;N.Tsuji
• 通讯作者: N.Tsuji