Enhanced tensile strength and ductility of an Al-6Si-3Cu alloy processed by room temperature rolling

2021 ◽  
pp. 163321
Author(s):  
Xiaoru Zhuo ◽  
Quan Zhang ◽  
Huan Liu ◽  
Zhichao Hu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Room Temperature Rolling ◽  
Strength And Ductility

Effect of Small Iron, Chromium and Boron Additions as Alloying Elements on Microstructure and Mechanical Properties of Ni3Al

2007 ◽  
Vol 23 ◽  
pp. 123-126
Author(s):  
Radu L. Orban ◽  
Mariana Lucaci
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Room Temperature ◽  
Alloying Elements ◽  
Alloyed Powder ◽  
Mechanically Alloyed ◽  
Powder Mixtures ◽  
B Additions ◽  
Strength And Ductility ◽  
Iron Chromium

This paper investigates the effect of Fe, Cr and B additions, in small proportions, as alloying elements in Ni3Al with the purpose to reduce its intrinsic fragility and extrinsic embrittlement and to enhance, in the same time, its mechanical properties. It represents a development of some previous research works of the authors, proving that Ni3Al-Fe-Cr-B alloys obtained by reactive synthesis (SHS) starting from Mechanically Alloyed powder mixtures have superior both room temperature tensile strength and ductility, and compression ones at temperatures up to 800 °C, than pure Ni3Al. These create premises for their using as superalloys substitutes.

Effect of chromium on properties of Fe3Al

1989 ◽  
Vol 4 (5) ◽  
pp. 1156-1163 ◽  
Author(s):  
C. G. McKamey ◽  
J. A. Horton ◽  
C. T. Liu
Keyword(s):  
Tensile Strength ◽  
Fracture Mode ◽  
Mixed Mode ◽  
Fracture Behavior ◽  
Room Temperature ◽  
Antiphase Boundary ◽  
Transgranular Cleavage ◽  
Room Temperature Ductility ◽  
Wavy Slip ◽  
Strength And Ductility

The effects of the addition of chromium on several properties of Fe3Al, including tensile strength and ductility, fracture behavior, and slip and dislocation characteristics, were studied. Alloying with up to 6 at. % chromium results in an increase in room temperature ductility from approximately 4% to 8–10%. Along with this increase in ductility, the addition of chromium produces a change in fracture mode from transgranular cleavage to a mixed mode of intergranular-transgranular cleavage, and a change in slip behavior from coarse straight slip to fine wavy slip. These phenomena are discussed in terms of the effect of chromium on the antiphase boundary energies and dislocation characteristics.

scholarly journals Effects of Ce-Rich Misch Metal on the Microstructures and Tensile Properties of as-Cast Mg-7Al-3Sn-1Zn Alloys

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1648
Author(s):  
Guo-Jun Liu ◽  
Yan-Hua Sun ◽  
Nan Xia ◽  
Xiao-Fang Guan
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Misch Metal ◽  
Mg17al12 Phase ◽  
Elongation To Failure ◽  
Thermal Stability Of ◽  
Strength And Ductility

The effects of small amounts of Ce-rich misch metal (Mm: 0.5, 1.0 and 2.0 wt.%) addition on the microstructure and tensile properties of as-cast Mg-7Al-3Sn-1Zn wt.% (ATZ731) alloy have been investigated. The addition of Mm restricts the formation of the Mg17Al12 phase but greatly promotes the Al4Mm phase. The proper Mm addition enhances the strength and ductility of ATZ731 alloys at both room temperature (RT) and 175 °C. ATZ731 alloys with 1.0 wt.% Mm addition exhibit an advantageous combination strength and ductility, with the ultimate tensile strength (UTS), 0.2% yield strength (YS) and elongation to failure (Ef) at 175 °C of ~148 MPa, ~102 MPa and ~28%, improved by ~14.7%, ~24.3% and ~53.8%, respectively, compared to those of ATZ731 alloy. This enhancement is primarily owing to the refined microstructures and the high thermal stability of Al4Mm at the elevated temperature in contrast with that of the Mg17Al12 phase. The fracture modes are also discussed.

THE EFFECT OF FE ADDITIONS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A Ti-Al-Mn ALLOY

2009 ◽  
Vol 23 (06n07) ◽  
pp. 783-789 ◽  
Author(s):  
C. J. BETTLES ◽  
T. PUEHRINGER ◽  
A. J. MORTON ◽  
D. TOMUS ◽  
M. A. GIBSON
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Room Temperature ◽  
Detrimental Effect ◽  
Alloying Additions ◽  
Β Phase ◽  
Low Levels ◽  
Cp Ti ◽  
And Behavior ◽  
Strength And Ductility

Alloys in the dilute Ti - Al - Mn system, which are considered to be near-α alloys, possess an attractive combination of strength and ductility, with the room temperature properties being intermediate between CP Ti and Ti -6 Al -4 V . Low levels of Fe are often tolerated in such alloys, but rarely introduced as deliberate alloying additions (with the exception of CP Ti grades), and from a processing perspective, it may indeed be desirable to have higher tolerances for Fe as it is often a common contaminant which must be controlled. In this presentation, the effect of 0.3 wt .% Fe on the microstructure and behavior of a Ti -0.75 wt .% Al -0.75 wt .% Mn is reported. It was found that annealing in the (α+β) phase field can lead to an increase in the ductility of the alloy without having a detrimental effect on the tensile strength.

Tensile Properties of a Cast TiAl Alloy with Directional Lamellar Microstructures

2013 ◽  
Vol 652-654 ◽  
pp. 1063-1066
Author(s):  
Sheng Li ◽  
Chun Lei Zhu ◽  
Rui Cao ◽  
Ji Zhang
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Tial Alloy ◽  
Lamellar Microstructure ◽  
Critical Value ◽  
Test Results ◽  
Tensile Fractures ◽  
Strength Retention ◽  
Strength And Ductility ◽  
Surface Observations

A cast TiAl alloy with directional γ-TiAl/α2-Ti3Al lamellar microstructure showed excellent strength retention at high temperatures and distinguished ambient ductility level as well. But both the ductility and strength at room temperature exhibited somewhat undulation. According to the microstructure and fracture surface observations, the negative diversification of the test results is attributed to the presence of mis-oriented lamellar colonies. The tilted lamellar colonies larger than a critical value can trigger the tensile fractures and therefore diminish the tensile strength and ductility significantly.

scholarly journals Microstructure and properties evolution of Mg–2Y–0.6Nd–0.6Zr alloy rolled at room and liquid nitrogen temperature

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yun Tan ◽  
Wei Li ◽  
Aiwen Li ◽  
Xiaofang Shi
Keyword(s):  
Tensile Strength ◽  
Liquid Nitrogen ◽  
Room Temperature ◽  
Extrusion Direction ◽  
Liquid Nitrogen Temperature ◽  
Processed Material ◽  
Cold Rolled ◽  
Room Temperature Rolling ◽  
Lower Temperature ◽  
Low Temperature Rolling

AbstractThe microstructure evolution, texture, mechanical behavior and twin deformation of the ECAPed Mg–2Y–0.6Nd–0.6Zr alloy at room and liquid nitrogen temperature were investigated by rolling samples. The ECAP processed material appeared the texture of 45° to the extrusion direction and its yield strength reached 93.6 MPa. The results showed that cryorolling encourages twinning in Mg–2Y–0.6Nd–0.6Zr alloy, enhancing the tensile strength and texture. Activation of {10–12} twinning during rolling was found to be more pronounced in the cryorolled samples than in the cold rolled samples owing to a lower temperature. As a result, the cryorolled samples had more twins than and cold rolled ones, the proportion of twin areas of room temperature rolling and ultra-low temperature rolling were: 2.45% and 4.23%.

Effect of Forging on Microstruture and Mechanical Properties of In Situ TiBw/Ti Composite

2011 ◽  
Vol 311-313 ◽  
pp. 43-47
Author(s):  
Yuong Chen ◽  
Chang Jiang Zhang ◽  
Rahoma Hasan K.S ◽  
Fan Tao Kong ◽  
Shu Long Xiao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Room Temperature ◽  
Microstructural Analysis ◽  
Longitudinal Direction ◽  
Alloy Matrix ◽  
High Temperature Mechanical Properties ◽  
Induction Skull Melting ◽  
Strength And Ductility

Ti-6Al-2.5Sn-4Zr-0.7Mo-0.3Si-0.3Y alloy matrix composite reinforced with 7%vol TiB whiskers was fabricated by Induction Skull Melting (ISM) technique and one-direction forged technology utilizing the reaction between titanium and TiB2. The microstructure, room temperature and high temperature mechanical properties have been presented and discussed. Microstructural analysis of the composites revealed that the microstructure was significantly refined and TiB whiskers were made to align the longitudinal direction after forging. It shows that the tensile strength and ductility of the composites has a significant improvement, especially at room temperature.

Improving the Strength and Ductility of Magnesium Alloys by Grain Refinement and Texture Modification

2005 ◽  
Vol 488-489 ◽  
pp. 177-180
Author(s):  
T. Liu ◽  
Yan Dong Wang ◽  
Shi Ding Wu ◽  
Shou Xin Li ◽  
Ru Lin Peng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Grain Refinement ◽  
Magnesium Alloys ◽  
Equal Channel Angular Pressing ◽  
Room Temperature ◽  
Angular Pressing ◽  
Texture Modification ◽  
Strength And Ductility

The room temperature tensile strength and ductility of Mg-3.3%Li alloy were improved simultaneously by two kinds of different equal channel angular pressing (ECAP) treatments. Microstructural analyses showed that grain refinement and texture modification are the principal reasons for the improvement of mechanical properties.

scholarly journals Effect of Microstructure Control on the Mechanical Properties of Hot Worked TiAl Alloy

2020 ◽  
Vol 58 (7) ◽  
pp. 459-465
Author(s):  
Jong-hun Kim ◽  
Jae-Kwon Kim ◽  
Seong-Woong Kim ◽  
Yong-Ho Park ◽  
Seung Eon Kim
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Lamellar Structure ◽  
Room Temperature ◽  
Tial Alloy ◽  
Post Heat Treatment ◽  
Β Phase ◽  
Fully Lamellar ◽  
Strength And Ductility

The microstructure and mechanical properties of a newly developed, β-phase containing TiAl alloy have been studied through hot working and post heat treatment to enhance room temperature ductility and strength. The controlled microstructures hadthree types of structure, fully lamellar, nearly lamellar and duplex, and were produced by cyclic heat-treatment in a single α region and (α+γ) region after a hot-forging process in high temperature (α+β) region. As a result of the room temperature tensile test, the fully lamellar structure exhibited a tensile strength of 622 MPa and ductility of 0.62%. The duplex structure had a tensile strength of 787 MPa and ductility of 1.22%, while the nearly lamellar structure showed a tensile strength of 880 MPa and ductility of 1.76%. In the room temperature tensile test, the nearly lamellar structure exhibited excellent tensile strength and ductility. The strength and ductility were increased by decreasing grain size and β / B2 phase fraction. The newly developed TiAl alloy showed higher tensile values compared with the previous TiAl alloys. The relationship between microstructure and room temperature tensile properties of the newly developed β-phase containing TiAl alloy was examined, and the best approach for hot working and post heat-treatment to obtain the most balanced mechanical properties was proposed.

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