Grain boundary embrittlement and enhancement in fine-grained magnesium alloys

细晶镁合金的晶界脆化与强化

• 批准号: 23760675
• 负责人: SOMEKAWA Hidetoshi
• 金额: $ 2.33万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23760675/
• 关键词: 破壊; マグネシウム; 溶質原子; 結晶粒界; 分子動力学; 材料工学; 溶質元素

The additional alloying elements affected the fracture toughness and the fracture mechanism in the fine-grained magnesium alloys, and these behaviors were closely related to the segregation energy. The alloys that had low segregation energy indicated high fracture toughness and the ductile fracture, while the alloys with large segregation energy exhibited low fracture toughness and the intergranular fracture. The change in the lattice parameter ratio was found to be the influential material parameter regardless of whether the grain boundary embrittlement was for enhancement or suppression in magnesium.

合金元素的添加影响了细晶镁合金的断裂韧性和断裂机制，这些行为与偏析能密切相关。具有低偏析能的合金表现出高的断裂韧性和韧性断裂，而具有大偏析能的合金表现出低的断裂韧性和沿晶断裂。晶格参数比的变化被认为是有影响力的材料参数，无论晶界脆化是增强或抑制镁。

项目成果

Nanoindentation behavior and deformed microstructures in coarse-grained magnesium alloys

• DOI: 10.1016/j.scriptamat.2012.11.010
• 发表时间: 2013-03
• 期刊: Scripta Materialia
• 影响因子: 6
• 作者: H. Somekawa;C. Schuh

Development of high strength and toughness magnesium alloys by microstructure controls

通过微观结构控制开发高强韧性镁合金

• 发表时间: 2011
• 作者: H. Somekawa;T. Mukai
• 通讯作者: T. Mukai

Effect of grain boundary structures on grain boundary sliding in magnesium

• DOI: 10.1016/j.matlet.2012.02.010
• 发表时间: 2012-06-01
• 期刊: MATERIALS LETTERS
• 影响因子: 3
• 作者: Somekawa, Hidetoshi;Mukai, Toshiji
• 通讯作者: Mukai, Toshiji

ナノインデンテーションを用いたマグネシウムの粒界・粒内クリープ評価

使用纳米压痕评估镁的晶界/晶内蠕变

• 发表时间: 2011
• 作者: H. Somekawa;A. Singh;T. Inoue and T. Mukai;染川英俊
• 通讯作者: 染川英俊

SAMURAI

武士