Synthesis of High Strength Nano-Micro Metallic Materials by Controlling Mesoscale Structure

控制介观结构合成高强度纳米微金属材料

• 批准号: 21246112
• 负责人: YAMASAKI Tohru
• 金额: $ 29.2万
• 依托单位: University of Hyogo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21246112/
• 关键词: 結晶・組織制御; ナノ結晶合金; 金属ガラス; Ni-W合金; 電解析出法; ナノ結晶材料; 加工硬化; 局所変形; 逆ホールペッチ; 力学特性; 成形加工

Structure and tensile plastic deformation behaviors of electrodeposited nanocrystalline Ni-W alloys have been examined. By controlling the surface roughness of the Cu-substrate, the Ni-W alloys with mesoscale Ni-segregated network structure has been prepared. Tensile strengths of the Ni-14～18 at. % W alloys were attained to about 3 GPa with the total strains of 3～5 % containing the large plastic strain of about 0.5～3 %. These results have suggested that the Ni-segregated mesoscale structure is effective for improvement of the tensile plasticity. Work hardening was also observed. By using the FIB-milling technique, local grain growth was observed near the fractured surface. It may be suggested that the local grain growth is occurred during local plastic deformation, resulting the work hardening according to the inverse Hall-Petch strengthening law.

研究了电沉积纳米晶Ni-W合金的组织和拉伸塑性变形行为。通过控制cu衬底的表面粗糙度，制备了具有中尺度ni偏析网络结构的Ni-W合金。Ni-14~18的抗拉强度。% W合金达到约3gpa，总应变为3~ 5%，其中大塑性应变约为0.5~ 3%。这些结果表明，ni偏析的细观尺度结构对提高拉伸塑性是有效的。还观察到加工硬化。采用fib -铣削技术，在断口附近观察到局部晶粒生长。可以认为，在局部塑性变形过程中发生了局部晶粒长大，导致加工硬化符合逆Hall-Petch强化规律。

项目成果

Ductile Hypoeutectic Zr-Based Bulk Metallic Glasses

延性亚共晶锆基大块金属玻璃

• 发表时间: 2011
• 期刊: Metallurgical and Materials Transactions A
• 作者: Y. Yokoyama;H. Tokunaga;A. R. Yavari;T. Kawamata;T. Yamasaki;K. Fujita;K. Sugiyama;P. K. Liaw and A. Inoue
• 通讯作者: P. K. Liaw and A. Inoue

ナノ結晶Ni-W合金の引張強度、変形特性

纳米晶Ni-W合金的拉伸强度和变形性能

• 发表时间: 2010
• 作者: 水津泰士;藤田和孝;園部昌子;鍋島隆行;山崎徹
• 通讯作者: 山崎徹

VISOCOUS FLOW BEHAVIOURS OF SUPERCOOLED LIQUIDS IN HYPOEUTECTIC Zr-Cu-Ni-Al BULK METALLIC GLASSES

亚共晶 Zr-Cu-Ni-Al 块体金属玻璃中过冷液体的粘流行为

• 发表时间: 2009
• 作者: T.Yamasaki;M.Yamada;T.Kikuchi;Y.Yokoyama;T.Yamamoto;T.Ishikawa;A.Inoue
• 通讯作者: A.Inoue

VISCOSITY AND MECHANICAL PROPERTIES OF HYPOEUTE CTIC Zr-Cu-Ni-Al BULK METALLIC GLASSES

Hypoeute CTIC Zr-Cu-Ni-Al块状金属玻璃的粘度和机械性能

• 发表时间: 2009
• 作者: M.Yamada;T.Mori;T.Kikuchi;T.Yamasaki;Y.Yokoyama;H.Kurishita;A.Inoue
• 通讯作者: A.Inoue

Effects of Noble Metal Additions on Mechanichal Properties of Zr-Cu-Ni-Al Bulk Metallic Glasses

贵金属添加对Zr-Cu-Ni-Al块体金属玻璃力学性能的影响

• 发表时间: 2012
• 作者: T. Yamasaki;M. Yamada;H. Ogino;K. Fujita;Y. Yokoyama;H. Kato and A. Inoue
• 通讯作者: H. Kato and A. Inoue