The Nucleation and Growth of Micro-Defects in Hot Compression Process

2010 ◽  
Author(s):  
Chanseo Jeong ◽  
Jun Yanagimoto ◽  
F. Barlat ◽  
Y. H. Moon ◽  
M. G. Lee
Keyword(s):  
Nucleation And Growth ◽  
Hot Compression ◽  
Compression Process

Numerical Simulation of Pore Evolution of 7050 Aluminum Alloy during Hot Compression Process

2016 ◽  
Vol 879 ◽  
pp. 2119-2124
Author(s):  
Yong Fu Wu ◽  
Hui Xue Jiang ◽  
Chun Zou ◽  
Kang Cai Yu ◽  
Hiromi Nagaumi
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Flow Stress ◽  
Hot Compression ◽  
Compression Process ◽  
Bulk Metal ◽  
Inner Pressure ◽  
7050 Aluminum Alloy ◽  
Pore Evolution ◽  
Evolution Behavior

Evolution behavior of pores in 7050 aluminum alloy during hot compression process has been investigated by finite element (FE) numerical simulation. The representative volume element (RVE) model containing one isolated pore is built, in which the gas in pore is treated as ideal gas. Effects of initial pore inner pressure and deformation temperature on pore evolution have been investigated. The simulation results indicate that stress concentration exists around the pore in the compressing process. At the simple compression condition, the inner pressure of the pore increases but the volume decreases as the bulk metals deforms. However, the volume reaches a plateau after the yield point of bulk metal. The plateau volume depends on the initial inner pressure of the pore and the flow stress of the bulk metal. Since the inner pressure of the pore balances with the flow stress of bulk metal at the interface, the temperature affects the evolution behavior of the pore through its influence on the flow stress of the bulk metal primarily.

Stress-Strain Behavior of Hot-Compression Mg-Li Alloy

2012 ◽  
Vol 485 ◽  
pp. 283-287
Author(s):  
Jian Bo Wen ◽  
Qian Liu ◽  
Deng Yu Gai
Keyword(s):  
Regression Analysis ◽  
Flow Stress ◽  
Hot Compression ◽  
Compression Process ◽  
Stress Strain ◽  
Arithmetic Average ◽  
Strain Behavior ◽  
Set Up ◽  
Gleeble 3500 ◽  
Gleeble 3500 System

The stress-strain behavior of hot-compression Mg-Li alloy was investigated by using a physical simulator Gleeble-3500 system. And the constitutive equation was set up by regression analysis and BP neural networks. Results show that the dynamic recrystallization occured during the hot-compression process. The grain size of the alloy increased and the stress decreased with increasing temperature. Regression analysis indicates that the flow stress can be expressed by hyperbolic sine model and the arithmetic average of errors is 14.13%. Training the flow stress prediction model with MatLab by an improved BP，the maximum arithmetic average of errors is 4.27%. The predicted stress-strain curves are in good agreement with the experimental results.

Processing map and hot working mechanisms of Cu-Ag alloy in hot compression process

2015 ◽  
Vol 22 (3) ◽  
pp. 821-828 ◽  
Author(s):  
Meng-han Wang ◽  
Long Huang ◽  
Ming-liang Chen ◽  
Yan-li Wang
Keyword(s):  
Processing Map ◽  
Hot Compression ◽  
Hot Working ◽  
Compression Process ◽  
Working Mechanisms

scholarly journals Deformation Behavior and Microstructural Evolution of Inconel 625 Superalloy during the Hot Compression Process

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 824
Author(s):  
Fulong Chen ◽  
Kaidi Li ◽  
Bin Tang ◽  
Degui Liu ◽  
Hong Zhong ◽  
...  
Keyword(s):  
Microstructural Evolution ◽  
Deformation Behavior ◽  
Hot Compression ◽  
Inconel 625 ◽  
Processing Temperature ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Compression Process ◽  
Inconel 625 Superalloy

Hot deformation behavior and the microstructural evolution of Inconel 625 superalloy plates are investigated by hot compression tests in a range of working temperatures (800–1050 °C) and strain rates (0.001–1 s−1). The microstructural observation shows that a strong <110> texture forms when the processing temperature is below 950 °C, whose intensity decreases with the increases of the temperature, and it disappears when compressing above 950 °C. During the compression test, twin-related dynamic recrystallization (DRX) occurs in the investigated temperature range, and the intensity of twin-related DRX increases with the increases of the temperature. In addition, as the temperature increases, the intensity of continuum DRX decreases.

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