相关实验视频
Updated: Jul 19, 2026

07:36
Experimental Procedure for Warm Spinning of Cast Aluminum Components
Published on: February 1, 2017
9.9K
优化热力学加工,大量生产具有热稳定的细粒度合金
Jesada Punyafu1,2, Chonlada Domrong1, Ussadawut Patakham3
1Department of Physics and Materials Science, Chiang Mai University, Chiang Mai 50200, Thailand.
Materials (Basel, Switzerland)
|September 13, 2025
概括
严重的塑性变形 (SPD) 和热处理产生稳定的细粒度Al-Sc-Zr合金. 纳米沉物在高温下确保微观结构完整性,这对于先进的材料应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 物理金学 物理金学
背景情况:
- 细粒度的金属结构提供了增强的机械性能.
- 在热应力下达到和保持细粒度是一个重大挑战.
- 合金与和具有高温应用的潜力.
研究的目的:
- 评估通过严重塑性变形 (SPD) 产生的细粒度Al-0.1Sc-0.1Zr合金的热稳定性.
- 为了比较不同SPD路径 (Bc和C) 和老化序列 (ECAP前后) 对微观结构和热稳定性的影响.
- 确定负责热稳定的微观结构特征.
主要方法:
- 散装Al-0.1Sc-0.1Zr合金制剂. 这是一种合金制剂.
- 使用Bc和C路径进行等通道角压力 (ECAP).
- 在ECAP之前和之后应用的衰老治疗.
- 电子背散衍射 (EBSD) 和传输电子显微镜 (TEM) 用于微观结构分析.
- 在450°C下进行10小时的热稳定性测试.
主要成果:
- 所有测试的微观结构都表现出极好的热稳定性,在热暴露后保持平均颗粒大小低于5微米.
- 纳米Al3(Sc,Zr) 沉被确定为关键的固定结构,防止谷物生长.
- 与C路线相比,ECAP路线Bc导致更稳定的高角度谷物边界 (HAGBs).
- 观察到类似的微观结构结果,不管衰老是在ECAP之前还是之后.
结论:
- SPD和纳米沉物的组合在Al-Sc-Zr合金中提供了特殊的热稳定性.
- 选择ECAP路线会影响谷物边界的稳定性,其中Bc是优越的.
- 处理路径提供了灵活性,可以为特定应用量身定制微结构,而不会影响热稳定性.
相关概念视频
Precipitation Processes
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
Steel Manufacturing
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
Structural Steel Products
Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments are...
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments are...
Steel Fastening Techniques
Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
Mechanical Characteristics of Steel
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...

