High-functionalization of Mechanical Property in Carbon Steels by Giant Straining

通过大应变实现碳钢机械性能的高功能化

• 批准号: 20760467
• 负责人: TODAKA Yoshikazu
• 金额: $ 2.83万
• 依托单位: Toyohashi University of Technology
• 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 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20760467/
• 关键词: 巨大ひずみ形状不変加工; 結晶粒微細化; 力学特性; 引張特性; 疲労特性; 水素脆化; 格子欠陥; 鉄鋼材料; High-Pressure Torsion; サブミクロン結晶粒組織

In the submicrocrystalline ultra-low carbon steel without special alloy-elements produced by HPT (High-Pressure Torsion) straining which is one of the severe plastic deformation processes, mechanical properties were investigated. In the tensile property, the engineering tensile strength was 1.9 GPa, which is similar to the value of maraging high-alloy steels. The elongation increased with strain, is caused by the reduction of the stress concentration due to the existence of continuously recrystallized grains. Hydrogen embrittlement (HE) occurred in the specimen with the high tensile strength of 1.9 GPa. However, its HE was suppressed via recovery process by annealing at low temperature while maintaining the high strength.

对高压扭转应变（HPT）生产的亚微晶无特殊合金元素的超低碳钢进行了力学性能研究。在抗拉性能方面，工程抗拉强度为1.9 GPa，与马氏体时效高合金钢相近。伸长率随着应变的增加而增加，是由于连续再结晶晶粒的存在使应力集中降低所致。拉伸强度高达1.9 GPa的试样出现氢脆（HE）。通过低温退火，在保持高强度的同时抑制了其HE。

项目成果

摩擦加工により形成した表面超微細結晶紐炭素鋼の疲労特性

摩擦加工表面超细晶碳钢的疲劳性能

• 发表时间: 2009
• 作者: 神志那薫;戸高義一
• 通讯作者: 戸高義一

HPT加工した極低炭素鋼の力学特性に及ぼす水素の影響

氢对 HPT 加工超低碳钢力学性能的影响

• 发表时间: 2009
• 作者: 森迫和宣;戸高義一
• 通讯作者: 戸高義一

HPT加工によるSUS304Lの組織制御

HPT加工SUS304L的组织控制

• 发表时间: 2009
• 作者: 佐藤秀之;梅本実;戸高義一
• 通讯作者: 戸高義一

Hydrogen Embrittlement of Submicrocrystalline Ultra-Low Carbon Steel Produced by High-Pressure Torsion Straining

• DOI: 10.4028/www.scientific.net/amr.89-91.763
• 发表时间: 2010-01
• 期刊: Advanced Materials Research
• 作者: Y. Todaka;Kazunobu Morisako;M. Kumagai;Y. Matsumoto;M. Umemoto

Fatigue property of sub micron-grained ultralowcarbon steel p roduced by HPT straining

HPT应变生产亚微米晶超低碳钢的疲劳性能

• 发表时间: 2008
• 作者: Y. Todaka;H. Nagai;M. Umemoto;M. Yoshi i;M. Kumagai
• 通讯作者: M. Kumagai