机械光谱学研究CrNiCoFeMn高的合金
Enrico Gianfranco Campari1, Angelo Casagrande2
1Department of Physics and Astronomy, Alma Mater Studiorum-University of Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy.
Materials (Basel, Switzerland)
|May 27, 2023
概括
本研究比较了诱导化和选择性激光化 (SLM) 用于制造CrNiCoFeMn高合金. SLM合金表现出不同的微观结构和机械性能,包括较低的Young Young合金.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 物理金学 物理金学
背景情况:
- 高合金 (HEAs) 具有独特的特性.
- 均原子CrNiCoFeMn是一种FCC HEA,具有潜在的应用.
- 像SLM这样的增材制造 (AM) 对传统方法提供了替代方案.
研究的目的:
- 为了比较CrNiCoFeMn HEA的微观结构和机械性能,它是由诱导炼产生的,而不是SLM.
- 研究冷加工和再结晶对这些特性的影响.
- 分析扬模和阻尼的温度依赖性.
主要方法:
- 从机械合金粉末中通过感应和选择性激光 (SLM) 制备CrNiCoFeMn HEA.
- 后加工处理包括冷加工和再结晶.
- 通过共振频率分析测量扬模和缓冲作为温度的函数 (300800 K).
主要成果:
- 随着产生的SLM合金含有化物和西格玛相沉物,与感应化合金不同.
- 室温 的模量为140 ± 10 GPa (感应化) 和90 ± 10 GPa (SLM).
- 再结晶使Young的模量增加到160±10 GPa (感应化) 和170±10 GPa (SLM).
- 缓冲测量显示了因脱位运动和粒度边界滑动而产生的峰值.
结论:
- 在CrNiCoFeMn HEA的SLM加工过程中,产生了具有二次相的独特微观结构.
- 重结晶显著提高了两个加工路径的模量.
- 缓冲行为与微观结构特征和变形机制有关.
相关概念视频
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
01:18Mechanical Characteristics of Steel
617
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...
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...
617
03:02Colors and Magnetism
12.0K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.0K