合金对AlCoCrFeNi2.1微观结构和机械性能的影响
Xue-Yao Tian1, Hong-Liang Zhang1, Zhi-Sheng Nong1
1School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China.
Materials (Basel, Switzerland)
|September 28, 2024
概括
合金AlCoCrFeNi2.1是具有 (V) 和 (Mo) 增强拉伸强度超过1000MPa的高合金. 这种Mo0.2合金表现出优越的强度 (1346.3MPa) 和延伸度 (24.6%),具有混合的柔性-脆性断裂机制.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
背景情况:
- 高合金 (HEAs) 由于其复杂的组成,具有独特的特性.
- 优德性高合金 (EHEAs) 结合了理想的特性,但需要进一步优化性能.
研究的目的:
- 调查 (V), (Mo) 和 (B) 的添加对AlCoCrFeNi2.1EHEAs的微观结构和机械行为的影响.
- 为了确定最佳的合金元素和含量,以提高拉伸强度和柔性.
主要方法:
- 在0.1%的V,Mo和B中添加0.1,0.2和0.3的AlCoCrFeNi2.1合金.
- 分析相位组成,微结构演变和机械性能 (拉伸强度,断裂延长).
- 使用微观结构检查对断裂机制的研究.
主要成果:
- 合金保持了FCC和BCC晶体结构,相位含量根据添加的元素而变化.
- 维和Mo分布在树突和树突间的区域;它们的添加导致拉伸强度超过1000MPa.
- 合金Mo0.2获得了最高的抗拉强度 (1346.3MPa) 和延伸度 (24.6%),显示混合的柔性-脆性断裂,而B的添加导致了裂纹断裂.
结论:
- V和Mo合金显著提高了AlCoCrFeNi2.1EHEAs的拉伸性能.
- Mo0.2合金表现出优异的机械性能,这归因于BCC板中的裂纹传播和FCC树突中的塑性变形.
- 的添加改变了断裂模式,使其成为易碎的裂纹,表明其不同的强化机制.
相关概念视频
02:37Metallic Solids
18.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.3K
01:18Mechanical Characteristics of Steel
404
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...
404
02:58Crystal Field Theory - Octahedral Complexes
26.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.2K