亚洲欧洲精品成人久久,99久久精品氩 99久久久蜜月,又大又长又粗又硬又猛

Info

Title:: Heterogeneous Microstructure Design and Property Optimization of Titanium Alloys Assisted by Phase Field Simulation

Author(s):: HAO Mengyuan1; 2; Li Pei3; WANG Dong1; 2; (1. Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China) (2. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China) (3. Thermal Power Research Institute Co. Ltd., National Engineering Research Center of Integration and Maintenance of Clean and Low-Carbon Thermal Power Generation System, NERC of TPGS, Xi’an 710032, China)

Keywords:: titanium alloy; phase field simulation; two-step aging; continuous cooling; heterogeneous microstructure

CLC:

PACS:: TG146.23

DOI:: 10.7502/j.issn.1674-3962.202112021

DocumentCode:

Abstract:: Improving the strength and ductility of structural materials simultaneously is still facing great challenges in scientific research and engineering applications. With the idea of guiding the design of model materials by phase field simulating microstructure, this paper proposes new methods for designing heterogeneous microstructure by activating different nucleation mechanisms to overcome the trade-off strength and ductility in structural material. Taking dual-phase titanium alloy as an example, this paper explores the influence of different heat treatment processes on the microstructure of the alloy by coupling the real thermodynamic database and the phase field model, and proposes a two-step aging that selects an appropriate aging temperature and time and a heat treatment scheme that regulates the cooling rate. Based on the simulation results, in the experiment, two-step aging (650 ℃/10 min+550 ℃/180 min) and continuous cooling (0.3125 ℃/min) were proposed in the Ti1023 alloy, and multi-scale heterogeneous microstructures were produced in the β titanium alloy. Further mechanical properties tests showed that the newly obtained heterogeneous microstructures have better strength-ductility matching properties compared to the conventional homogeneous microstructure. The idea of optimizing the properties by modulating the multiscale precipitation microstructure through the heat treatment process based on the phase transition theory proposed in our work provides a direction for the performance improvement of other structural materials.

亚洲国产aⅴ成人精品无吗,中文字幕999精品,人妻人人妻a乱aa乱,日韩三级aaaaa,亚洲午夜成人精品无码色欲,国产第一页第二页av,老熟女北岛玲888av,99re热这里只有精品18,久久精品中文字幕久久

Heterogeneous Microstructure Design and Property Optimization of Titanium Alloys Assisted by Phase Field Simulation(PDF)

MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]

Info

References

Memo

Common functions

Navigate

Tools

Statistics