一个改进的谷物生长模型及其在航空发动机轮机盘的梯度热处理中的应用
Zhaofeng Liu1,2, Chao Wang2, Junyi Cheng1,2
1State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|October 14, 2023
概括
一个新的谷物生长模型预测了基于的超级合金中的最终谷物大小. 这个模型成功地引导了制造双微结构的航空发动机轮盘.
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.
- 计算机建模 计算建模
背景情况:
- 传统的谷物生长模型缺乏预测最终的谷物大小.
- 了解谷物进化对于先进的材料应用至关重要.
研究的目的:
- 开发和验证一个新的谷物生长模型,包括最终的谷物大小.
- 应用该模型来预测和实现航空发动机轮盘中的双微结构要求.
主要方法:
- 在传统的谷物生长模型中引入了最终的谷物大小.
- 将模型集成到有限元方法 (FEM) 代码中.
- 将模型应用于基于的超级合金,并通过对轮盘的实验热处理进行验证.
主要成果:
- 该模型准确地预测了在梯度热处理下轮盘中的颗粒大小分布.
- 实验验证显示温度预测误差小于2%和粒度大小误差小于5%.
- 实现了所需的双微观结构,在边缘和孔区域具有特定的ASTM粒度.
结论:
- 开发的颗粒生长模型对于预测和控制超级合金中的微观结构是有效的.
- 该模型成功指导了复杂的双微观结构组件的制造.
- 这种方法可以精确地控制材料特性,用于诸如航空发动机等苛刻的应用.
更多相关视频
07:58Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure
Published on: January 18, 2021
6.0K
10:03Uncoupling Coriolis Force and Rotating Buoyancy Effects on Full-Field Heat Transfer Properties of a Rotating Channel
Published on: October 5, 2018
8.3K
相关概念视频
01:10Heat Engines
2.8K
A heat engine is a device used to extract heat from a source and then convert it into mechanical work used for various applications. For example, a steam engine on an old-style train can produce the work needed for driving the train.
Whenever we consider heat engines (and associated devices such as refrigerators and heat pumps), we do not use the standard sign convention for heat and work. For convenience, we assume that the symbols Qh, Qc, and W represent only the amounts of heat transferred...
Whenever we consider heat engines (and associated devices such as refrigerators and heat pumps), we do not use the standard sign convention for heat and work. For convenience, we assume that the symbols Qh, Qc, and W represent only the amounts of heat transferred...
2.8K
01:20Mechanisms of Heat Transfer II
3.3K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.3K
01:14Mechanisms of Heat Transfer
339
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
339
01:14Mechanisms of Heat Transfer I
4.3K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.3K
01:17Turbine-Governor Control
243
Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
243
01:24Wind Turbine Machine Models
146
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
146