ナノ結晶化アルミニウム合金の低温・高速超塑性特性とその粒径依存性に関する研究

纳米晶铝合金低温高速超塑性及其晶粒尺寸依赖性研究

• 批准号: 08242209
• 负责人: 松木 賢司
• 金额: $ 1.92万
• 依托单位: University of Toyama
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-08242209/
• 关键词: アルミニウム合金粉末; メカニカルアロイング; ナノ結晶粒; 高速超塑性; m値; 伸び; しきい応力

今年度は2024A1基粉末合金の組織微細化と高速超塑性特性について研究し,以下の結論が得られた.1.2024A1-3Fe-5Ni急冷凝固粉末(RS)の微細結晶粒組織を有するバルク材を得る方法として,(a)RS粉末の押出し(押出し温度:623〜723K,押出し比:10)→温間圧延(圧延温度:523〜623K,圧延率:55%),及び(b)RS粉末のMA(MA時間:0.5〜43hr)→温間圧粉(圧粉温度:673K),の2種類で検討した.その結果,適切な固化成形条件の付加によって,RS材,MA材でそれぞれ約700nmと200nmの極めて微細な等軸微細粒組織が得られた.また,MA2024-SiCp複合材でも微細組織が得られた.2.RS材の破断伸び,および応力のひずみ速度依存性の測定の結果,773Kで,初期ひずみ速度3×10^<-2>〜10s^<-1>の範囲でm値が0.3以上,また最大約300%の破断伸びが得られ高速超塑性を示すことが分かった.3.MA材でも約5s^<-1>以上で約0.3の高いm値を示す.しかしそれ以下のひずみ速度領域ではm値は著しく低く,直線外挿法で見積もったしきい応力の値は,それぞれ約5MPaと16MPaでMA材の結晶粒組織が微細であるにもかかわらず,しきい値は大きい事が分かった.4.MAによって導入されたAl_2O_3やAl_4C_3微細粒子は結晶粒微細化に役立つが,しきい応力増大の要因となる事が結論された.

The following results have been obtained in this year's 2024A1-based powder alloy microstructure microalloying high-speed superplasticity test. The microstructure of 1.2024A1-3Fe-5Ni solidified powder (RS) is characterized by the microstructure test method, (a) RS powder withdrawal temperature (discharge temperature: 623-723K, ratio: 10) temperature extension (extension temperature: 523K-623K) Ductility: 55%), and (b) RS powder MA (MA time: 0.5~43hr) at room temperature (powder temperature: 673K). The results showed that the microstructures of 700nm, RS and MA materials were better than those of other microstructures, such as microstructures. The microstructure of MA2024-SiCp composite wood was tested. 2.The tensile strength of RS wood was measured by tensile test. the results of speed dependence test, 773K, initial curing speed 3 × 10 ^ & lt;-2>~ 10s ^ & lt;-1&gt. The maximum elongation at break is about 300%. The high-speed superplasticity is characterized by high-speed superplasticity. 3. Ma material is about 5s ^ & lt;-1> is above 0.3mm. In the following speed field, the speed field is sensitive to low temperature, and the straight-line out-of-line method is used to measure the strength of the grains. the microstructure of 5MPa 16MPa MA materials is characterized by the microstructure of the microstructures. the results show that the microstructures of the particles are different. 4. The MA micrometer is used to analyze the microstructures of Al _ 2O _ 3 Al _ 4C_3 microparticles and grain microstructures. There is a great deal of strength because of the discussion and discussion of the incident.

项目成果

K.Matsuki: "Stress-Strain Relationstily during Hot Compression of SiCp-2024Al, Superulastic Compostites" Proc.Ind.Sympo.of Towards Innevation in Superplasticity. 235-242 (1996)

K.Matsuki：“SiCp-2024Al、超弹性复合材料热压缩过程中的应力-应变关系”Proc.Ind.Sympo.of Towards Innovation in Super Plasticity。