Numerical and experimental investigations of the hot stamping process for complex aircraft skin parts composed of TA32 high-temperature titanium alloy using an Arrhenius-type constitutive model

2019 ◽  
Vol 103 (1-4) ◽  
pp. 807-817
Author(s):  
Can Chen ◽  
Minghe Chen ◽  
Lansheng Xie ◽  
Zonghui Gong ◽  
Jianhua Ye
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Constitutive Model ◽  
Hot Stamping ◽  
Experimental Investigations ◽  
Stamping Process ◽  
Aircraft Skin

scholarly journals Feasibility study of a novel hot stamping process for Ti6Al4V alloy

2018 ◽  
Vol 190 ◽  
pp. 08001
Author(s):  
Mateusz Kopec ◽  
Kehuan Wang ◽  
Yaoqi Wang ◽  
Liliang Wang ◽  
Jianguo Lin
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Phase Transformation ◽  
New Technology ◽  
Hot Stamping ◽  
Constant Strain Rate ◽  
Tensile Tests ◽  
Ti6al4v Titanium Alloy ◽  
Stamping Process ◽  
Forming Tools

To investigate the feasibility of a novel hot stamping process for the Ti6Al4V titanium alloy using low temperature forming tools, mechanical properties of the material were studied using hot tensile tests at a temperature range of 600 - 900°C with a constant strain rate of 1s-1. Hot stamping tests were carried out to verify the feasibility of this technology and identify the forming window for the material. Results show that when the deformation temperature was lower than 700°C, the amount of elongation was less than 20%, and it also had little change with the temperature. However, when the temperature was higher than 700°C, a good ductility of the material can be achieved. During the forming tests, parts failed at lower temperatures (600°C) due to the limited formability and also failed at higher temperatures (950°C) due to the phase transformation. The post-form hardness firstly decreased with the temperature increasing due to recovery and then increased due to the phase transformation. Qualified parts were formed successfully between temperatures of 750 - 850°C, which indicates that this new technology has a great potential in forming titanium alloys sheet components.

Development of Hot Stamping Process for Aircraft Titanium Alloy Parts Using Resistance Heating

2014 ◽  
Vol 55 (647) ◽  
pp. 1097-1101 ◽  
Author(s):  
Kiyoshi YAMAZAKI ◽  
Takashi YAMAGUCHI ◽  
Yohei MURAYAMA ◽  
Ken-ichiro MORI ◽  
Tomoyoshi MAENO
Keyword(s):  
Titanium Alloy ◽  
Hot Stamping ◽  
Resistance Heating ◽  
Stamping Process

Modeling of Flow Stress for one New Kind of Metastable β Titanium Alloy at High Temperature

2011 ◽  
Vol 311-313 ◽  
pp. 716-721
Author(s):  
Zhe Jun Wang ◽  
Hong Fu Qiang ◽  
Xue Ren Wang
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Flow Stress ◽  
Constitutive Model ◽  
Flow Behavior ◽  
Accurate Estimate ◽  
Compression Tests ◽  
Stress Strain ◽  
Nonlinear Constitutive Equation ◽  
Peak Value

Based on the characteristics of the flow stress curves for one new kind of metastable Ti2448 titanium alloy from isothermal hot compression tests, the constitutive model was developed to describe the relation between flow stress and strain, strain rate, deformation temperature completely. During this process, the flow behavior of alloy at high temperature undergo flow softening caused by dynamic recovery (DRV) was modeled by the adopted hyperbolic sine function based on the unified viscoplasticity theory, the further drop in flow stress after the peak value in stress-strain curves was assumed to be caused by temperature rise and the constitutive model was modified accordingly. Additionally, the material constants were determined by optimization strategies, which is a new method to solve the nonlinear constitutive equation. The stress-strain curves predicted by the developed constitutive model well agree with experimental results, which confirms that the developed constitutive model gives an accurate estimate of the flow stress of Ti2448 titanium alloy and can provide an effect method to model the flow behavior of metastable titanium alloy at high temperature.

A New Hot Stamping Process with Quenching and Partitioning Treatment

2015 ◽  
Vol 1095 ◽  
pp. 673-676 ◽  
Author(s):  
Pei Xing Liu ◽  
Xiang Yun Yu ◽  
Kai Wang ◽  
Bin Zhu ◽  
Jian Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Retained Austenite ◽  
Hot Stamping ◽  
Quenching Temperature ◽  
Quenching And Partitioning ◽  
Servo Press ◽  
Stamping Process ◽  
Partitioning Time

A new hot stamping process with quenching and partitioning treatment is proposed in the paper. Compared to direct hot stamping process, the microstructures with some retained austenite not only including martensite are formed according to the constrained carbon equilibrium (CCE) model. During the new hot stamping process, tools with high temperature are used to control the quenching temperature (QT) between Ms and Mf, and the partitioning treatment of the part is also implemented in the tools by prolonging holding times. In this paper, different holding times (partitioning times) controlled by servo press, are used to research the influence of partitioning time on mechanical properties.

scholarly journals A Study on the Effect of Process and Material Variables on the Hot Stamping Formability of Automotive Body Parts

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1029
Author(s):  
Kang Ho You ◽  
Heung-Kyu Kim
Keyword(s):  
High Temperature ◽  
Hot Stamping ◽  
Rate Sensitivity ◽  
Martensite Phase ◽  
Material Behavior ◽  
Body Parts ◽  
Automotive Body ◽  
Sheet Blank ◽  
Stamping Process ◽  
Automotive Body Parts

Hot stamping is a method capable of manufacturing high-strength automotive body parts by inducing a martensitic phase transformation through forming and die quenching after heating a metal sheet into a high temperature austenite phase. However, it is not easy to solve various formability problems occurring in the hot stamping process due to the complexity of the process and material behavior during high temperature forming. In this study, fracture-related forming limits and martensite phase ratio were selected as criteria for evaluating hot stamping formability. First, a hot stamping test was performed on a T-type part that simplified the B-pillar, an automotive body part, and the fracture behavior according to the temperature and thickness of the sheet blank was investigated. Additionally, forming analysis was performed on the hot stamping process of mass-produced B-pillar parts by varying the temperature of the sheet blank, the thickness of the sheet blank, the die-blank friction coefficient, and the strain-rate sensitivity of material among various process and material variables. Based on the analysis results, the effect of each process and material variable on the hot stamping formability of B-pillar parts was quantitatively analyzed. By utilizing the results of this study, it will be possible to solve the formability problem that occurs in the mass-production hot stamping process for automotive body parts and improve the quality of parts in the future.

Ti-5Al-4FeCr

Alloy Digest ◽  
1969 ◽  
Vol 18 (6) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Temperature ◽  
Heat Treating ◽  
Age Hardening ◽  
Temperature Performance ◽  
Alpha Beta ◽  
Hardening Heat Treatment

Abstract Ti-5A1-4FeCr is an alpha-beta type titanium alloy recommended for airframe components. It responds to an age-hardening heat treatment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-58. Producer or source: Titanium alloy mills.

Ti-0.20Pd

Alloy Digest ◽  
1968 ◽  
Vol 17 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Temperature ◽  
Physical Properties ◽  
Chemical Industry ◽  
Heat Treating ◽  
Temperature Performance ◽  
Industry Applications ◽  
Reactive Metals ◽  
Alpha Type

Abstract Ti-0.20Pd is an alpha-type titanium alloy recommended for the chemical industry applications where environments are moderately reducing, or fluctuate between oxidizing and reducing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-56. Producer or source: Reactive Metals Corporation.

TITANIUM 1Al-8V-5Fe

Alloy Digest ◽  
1968 ◽  
Vol 17 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Reactive Metals

Abstract Titanium IA1-8V-5Fe is an all beta type titanium alloy recommended for high temperature fasteners. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-55. Producer or source: Reactive Metals Corporation.

REPUBLIC RS-110A

Alloy Digest ◽  
1963 ◽  
Vol 12 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Shear Strength ◽  
High Temperature ◽  
Structural Material ◽  
Physical Properties ◽  
Heat Treating ◽  
Alloying Element ◽  
Temperature Performance ◽  
Medium Strength

Abstract Republic RS-110A is a titanium alloy containing manganese as its principle alloying element. The alloy is a medium strength, highly formable sheet alloy which has been used extensively as an aircraft structural material. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-35. Producer or source: Republic Steel Corporation, Titanium Division.

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