Microstructural and Mechanical Characterizations of a Ductile Metastable β Titanium Alloy Subjected to Low Temperature Annealing

2014 ◽  
Vol 922 ◽  
pp. 856-861
Author(s):  
Jing Yong Zhang ◽  
Fan Sun ◽  
Cedrik Brozek ◽  
Sophie Nowak ◽  
Frédéric Prima
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
Low Temperature ◽  
Strain Hardening ◽  
Vickers Hardness ◽  
True Strain ◽  
High Strength ◽  
Hardness Increase ◽  
Short Time ◽  
Strain Hardening Behavior

Low temperature thermal treatments, between 423K and 573K, were performed to optimize the mechanical properties of a ductile beta metastable titanium alloy with TRIP and TWIP effects. A set of short-time heat-treatments (STT) were applied at 423K, 473K, 523K, and 573K for 60 and 600s, respectively. The results show that the tensile strength and Vickers hardness increase as the annealing temperature increasing. The sample annealed at 423K for 60s possessed a modest yielding strength (≈566MPa), Vickers hardness (≈327HV) and excellent elongation (≈53%); whereas the sample annealed at 573K for 600s shows a very high yielding strength (≈1256MPa), Vickers hardness (≈441HV) but a small ductility. It is worth noting that the sample annealed at 473K for 60s exhibited the best combination of high strength (close to 1200MPa of true stress) and a stable plastic zone of ɛ=0.4(true strain) with a significant strain hardening effect. It is clarified that both TRIP and TWIP deformation mechanisms are promoted after the heat treatment of 60s at 473K, resulting in good balance among the tensile strength, the ductility and the strain hardening behavior.

ATI 6-2-4-2

Alloy Digest ◽  
2020 ◽  
Vol 69 (8) ◽  
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
High Temperature ◽  
Creep Strength ◽  
High Strength ◽  
Heat Treating ◽  
Good Combination ◽  
Long Term Stability ◽  
Temperature Performance

Abstract ATI 6-2-4-2 is a near-alpha, high strength, titanium alloy that exhibits a good combination of tensile strength, creep strength, toughness, and long-term stability at temperatures up to 425 °C (800 °F). Silicon up to 0.1% frequently is added to improve the creep resistance of the alloy. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ti-169. Producer or Source: ATI.

CRUCIBLE D6

Alloy Digest ◽  
1962 ◽  
Vol 11 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Low Temperature ◽  
High Strength Steel ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance ◽  
Ultra High Strength Steel ◽  
Crucible Steel

Abstract Crucible D6 is a low alloy ultra-high strength steel developed for aircraft-missile applications and primarily designed for use in the 260,000-290,000 psi tensile strength range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on low temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-129. Producer or source: Crucible Steel Company of America.

Characterization of Mg-Al Sheet Clad Materials Fabricated by Hot Rolling

2007 ◽  
Vol 26-28 ◽  
pp. 409-412 ◽  
Author(s):  
Jae Seol Lee ◽  
Hyeon Taek Son ◽  
Ki Yong Lee ◽  
Soon Sub Park ◽  
Dae Guen Kim ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Vickers Hardness ◽  
Hot Rolling ◽  
High Strength ◽  
Interface Layer ◽  
Rolling Temperature ◽  
Al Alloy ◽  
Clad Sheet ◽  
The Difference ◽  
Interface Layers

AZ31 Mg / 5083 Al clad sheet was fabricated by the hot rolling method and its mechanical properties were investigated in this study. The tensile strength and yield strength of Mg- Al clad samples were slightly higher than that of AZ31 Mg sample, resulting in high strength 5083 Al alloy. Also, in the case of the AZ31 Mg sample, tensile strength indicated different values to the rolling directions. The thickness of interface layers between magnesium and aluminum materials increased with increasing rolling temperature. The thickness of interface layer was about 1.2 μm and 1.6 μm, respectively. The difference of thickness on the interface layer with variation of rolling temperature was attributed to promote the diffusion between magnesium and aluminum materials. The Vickers hardness of Mg-Al interface layer was around 125 Hv. The interface layer composed of hard inter-metallic phases which may act a increment of Vickers hardness depending upon its thickness.

Strain Hardening Behavior Prediction Model For Automotive High Strength Multiphase Steels

2015 ◽  
Vol 86 (12) ◽  
pp. 1574-1582 ◽  
Author(s):  
Antonella Dimatteo ◽  
Valentina Colla ◽  
Gianfranco Lovicu ◽  
Renzo Valentini
Keyword(s):  
Prediction Model ◽  
Strain Hardening ◽  
High Strength ◽  
Behavior Prediction ◽  
Hardening Behavior ◽  
Strain Hardening Behavior ◽  
Multiphase Steels

Relationship between Thickness of Lamellar α+β Phase and Mechanical Properties of Titanium Alloy

2011 ◽  
Vol 311-313 ◽  
pp. 1916-1919 ◽  
Author(s):  
Yan Wei Sui ◽  
Ai Hui Liu ◽  
Bang Sheng Li ◽  
Jing Jie Guo
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
Yield Strength ◽  
Tensile Property ◽  
Vickers Hardness ◽  
Induction Melting ◽  
Β Phase ◽  
Specific Elongation ◽  
Elongation Percentage ◽  
Alloy Castings

Titanium alloy castings are made by means of induction melting technology. The relationships thickness of lamellar α+β phase and tensile strength, yield strength, elongation percentage, and Vickers-hardness, as well as the effect of tensile property on the Vickers-hardness are investigated for Ti-6Al-4V alloy castings. The results show that the relationships between thickness of lamellar α+β phase, and tensile strength, yield strength, specific elongation, and Vickers-hardness meet the Hall-Petch equation. And the tensile property increases linearly with Vickers-hardness.

A new titanium alloy with a combination of high strength, high strain hardening and improved ductility

2015 ◽  
Vol 94 ◽  
pp. 17-20 ◽  
Author(s):  
F. Sun ◽  
J.Y. Zhang ◽  
M. Marteleur ◽  
C. Brozek ◽  
E.F. Rauch ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Strain Hardening ◽  
High Strain ◽  
High Strength

Effect of Ag Addition on the Microstructure and Mechanical Properties of High Conductivity Cu-1Cr-Mg-P Alloy

2011 ◽  
Vol 695 ◽  
pp. 389-392
Author(s):  
Seung Jin Lee ◽  
Joon Sik Park ◽  
Ki Tae Kim ◽  
Jeong Min Kim
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Tensile Strength ◽  
Low Temperature ◽  
Cold Rolling ◽  
Liquid Nitrogen ◽  
Base Composition ◽  
High Strength ◽  
High Conductivity ◽  
Ag Addition

High strength high conductivity Cu-1%Cr-Mg-P alloy was selected as a base composition and Ag was added to the alloy in order to further increase the strength without sacrificing the conductivity. SEM and TEM analyses indicated that very fine MgP and Ag(Mg) precipitates were formed in addition to relatively large Cr phase in the Cu matrix. Significantly high strength could be obtained through the special cold rolling at an extremely low temperature using liquid nitrogen. The electrical conductivity of alloy was slightly decreased by the Ag addition, but the tensile strength could be further enhanced by it.

Comparisons of Constitutive Models for Steel Over a Wide Range of Temperatures and Strain Rates

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Farid Abed ◽  
Fadi Makarem
Keyword(s):  
Flow Stress ◽  
Strain Hardening ◽  
Shear Bands ◽  
Constitutive Models ◽  
Steel Structures ◽  
High Strength ◽  
Stress And Strain ◽  
Strain Rates ◽  
Wide Range ◽  
Strain Hardening Behavior

This study investigates and compares several available plasticity models used to describe the thermomechanical behavior of structural steel subjected to complex loadings. The main purpose of this comparison is to select a proper constitutive model that can later be implemented into a finite element code to capture localizations (e.g., shear bands and necking) in steel and steel structures subjected to low- and high-velocity impact. Four well-known constitutive models for viscoplastic deformation of metals, i.e., Johnson–Cook (JC), Zerilli–Armstrong (ZA), Rusinek–Klepaczko (RK), and Voyiadjis–Abed (VA), have been investigated and compared with reference to existing deformation data of HSLA-65 and DH-36 steel conducted at low and high strain rates and various initial temperatures. The JC, ZA, and RK models reasonably describe the flow stress and the strain hardening behavior only in the certain ranges of strain, strain rate, and temperature for which the models were developed. This was attributed to the inaccurate assumptions used in developing these models. In contrast, the VA model most effectively describes the flow stress and strain hardening in which very good predictions are observed for the constitutive behavior of high strength steel over a wide range of strains, strain rates, and temperatures.

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