Development of Aluminum-based Alloys with High Elevated-temperature Strength and Impact Strength by Dispersion of Nanoscale Quasicrystalline Particles

通过纳米准晶颗粒的分散开发具有高高温强度和冲击强度的铝合金

• 批准号: 12650689
• 负责人: KIMURA Hisamichi
• 金额: $ 1.28万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650689/
• 关键词: aluminium alloy; quasicrystalline phase; nanoscale particles; high specific strength; mechanical property; high-elevated temperature strength; melt-quenching method; powder metallurgy

Recently, aluminum-based light alloys with high strength have attracted great interest because of the increase in the importance of energy and environmental problems. It is well known that ordinary aluminum-based alloys have been developed by the use of the following strengthening mechanisms ; i.e., solid solution, precipitation, grain size refinement, dispersion, work hardening and fiber reinforcement. However, the maximum tensile strength for those alloys is only about 600 MPa. In order to fabricate a new aluminum-based alloy with much higher tensile strength even at high temperatures, amorphous or quasicrystalline particles with high hardness and thermal stability should be used as precipitating particles. Until now, we have carried out the development of aluminum-based alloys with high strength were nanoscale amorphous and quasicrystalline particles are dispersed, we should use amorphous or quasicrystalline particles as precipitates.In this work, the structure and mechanical proper … More ties are studied for aluminum-based alloys with nanoscale quasicrystalline particles dispersed into fcc-Al phase. The results are summarized as follows.(1) Structure of melt-quenched Al-Ln-TM (Ln : rare earth element, TM : transition metal) and Al-ETM (ETM : Ti, V, Cr, Mn)-LTM (LTM : Fe, Co, Ni, Cu) alloys with high aluminum concentration changes in order of Al+compound→Al+quasicrystalline→Al+amorphous→amorphous according as decrease of group number of transition metals.(2) The quasicrystalline particle size in the powder metallurgy (P/M) aluminum alloys is in the range of 200 to 900nm.(3) Ultamate tensile strength (σ_<UTS>) of P/M aluminum alloys with dispersion quasicrystalline particles ranges from 540 to 670 MPa. The maximum value of σ_<UTS>=670 MPa was obtained for P/M Al_<93>Fe_3Cr_2Ti_2 alloy. This value is more excellent than σUTS=600 MPa of conventional extra super duralumin(4) Ultamate tensile strength (σ_<UTS>=350 MPa) after holding for 100 hours at 573 K is larger than target 300 MPa for high elevated-temperature strength of aluminum alloy(5) The high elevated-temperature strength remains unchanged after annealing for 100 hours at 573 K and the good wear resistance against S45C steel is also maintained for the extrued alloy tested at the sliding velocity of 0.5 to 2 m/s. Less

近年来，由于能源和环境问题的重要性增加，具有高强度的铝基轻合金引起了人们极大的兴趣。众所周知，普通的铝基合金已经通过使用以下强化机制而被开发出来;即，固溶、沉淀、晶粒尺寸细化、分散、加工硬化和纤维增强。然而，这些合金的最大拉伸强度仅为约600 MPa。为了制备即使在高温下也具有高得多的拉伸强度的新型铝基合金，应使用具有高硬度和热稳定性的非晶或准晶颗粒作为沉淀颗粒。到目前为止，我们已经开展了高强度铝基合金的开发，纳米级非晶和准晶颗粒是分散的，我们应该使用非晶或准晶颗粒作为沉淀物。 ...更多信息 研究了纳米准晶颗粒弥散分布在fcc-Al相中的铝基合金的热稳定性。结果总结如下。(1)高铝含量的Al-Ln-TM（Ln：稀土元素，TM：过渡金属）和Al-ETM（ETM：Ti，V，Cr，Mn）-LTM（LTM：Fe，Co，Ni，Cu）合金的快淬组织随过渡金属族数的减少依次为Al+化合物→ Al+准晶→ Al+非晶→非晶。(2)粉末冶金（P/M）铝合金中的准晶颗粒尺寸在200至900nm的范围内。(3)准晶弥散分布的粉末冶金铝合金的极限抗拉强度（σ_）为540~670 MPa。<UTS>粉末冶金Al_Fe_3Cr_2Ti_2合金的抗拉强度最大，为670 MPa。<UTS><93>（4）在573 K下保温100小时后的极限抗拉强度（σ_（UTS）= 350 MPa）大于铝合金高温强度的目标值300 MPa。（5）在573 K下退火100小时后的高温强度保持不变，在0.5~2 m/s的滑动速度下测试的挤压合金也保持对S45 C钢的良好耐磨性。<UTS>少

项目成果

笹森賢一郎: "液体急冷Al-Fe-Ti-M(M=V, Cr, Mn)合金の組織と機械的性質"粉体および粉末冶金. 47. 417-422 (2000)

Kenichiro Sasamori：“液体淬火Al-Fe-Ti-M（M=V、Cr、Mn）合金的结构和机械性能”粉末和粉末冶金。47. 417-422 (2000)

A.Inoue: "Nanocrystalline Al-based Bulk Alloys with High Strength above 1000MPa"Mater Sci. Forum. 306-362. 129-136 (2001)

A.Inoue：“1000MPa以上高强度纳米晶铝基大块合金”Mater Sci。

H.M.Kimura: "Production and Mechanical Properties of Al-M(M: Cr,V,Ti) Base Alloys"Trans.MRS-J. 25. 1065-1068 (2000)

H.M.Kimura：“Al-M(M:Cr,V,Ti)基合金的生产和机械性能”Trans.MRS-J。

H.M.Kimura: "Microstructure and Elevated-Temperature Strength of P/M Al_<96-x>Fe_xCr_2Ti_2 (x=3,4,5) Alloys"LiMAT-2001 (Proc. 2^<nd> Int'nl Conf. Light Materials for Transportation Systems, Korea, 2001), eds N.J. Kim. 2. 609-614 (2001)

H.M.Kimura：“P/M Al_<96-x>Fe_xCr_2Ti_2 (x=3,4,5) 合金的微观结构和高温强度”LiMAT-2001（Proc. 2^<nd> Intnl Conf. Light Materials

H. M. Kimura et al.: "Formation, microstructure and mechanical properties of Al-Fe base quasicrystalline alloys"Mater. Sci. Eng.. 294-296. 168-172 (2000)

H. M. Kimura 等：“Al-Fe 基准晶合金的形成、显微组织和力学性能”材料。