Pre-heated dual-cured resin cements: analysis of the degree of conversion and ultimate tensile strength

It is expected that the demand for Metal Matrix Composite (MMCs) will increase in these applications in the aerospace and automotive industries sectors, strengthened AMC has different advantages over monolithic aluminium alloy as it has characteristics between matrix metal and reinforcement particles. However, adequate joining technique, which is important for structural materials, has not been established for (MMCs) yet. Conventional fusion welding is difficult because of the irregular redistribution or reinforcement particles. Also, the reaction between reinforcement particles and aluminium matrix as weld defects such as porosity in the fusion zone make fusion welding more difficult. The aim of this work was to show friction stir welding (FSW) feasibility for entering Al 6061/5 to Al 6061/18 wt. % SiCp composites has been produced by using stir casting technique. SiCp is added as reinforcement in to Aluminium alloy (Al 6061) for preparing metal matrix composite. This method is less expensive and very effective. Different rotational speeds,1000 and 1800 rpm and traverse speed 10 mm \ min was examined. Specimen composite plates having thick 10 mm were FS welded successfully. A high-speed steel (HSS) cylindrical instrument with conical pin form was used for FSW. The outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt. %) was 195 MPa at rotation speed 1800 rpm, the outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt.%) was 165 MPa at rotation speed 1000 rpm, that was very near to the composite matrix as-cast strength. The research of microstructure showed the reason for increased joint strength and microhardness. The microstructural study showed the reason (4 %) for higher joint strength and microhardness. due to Significant of SiCp close to the boundary of the dynamically recrystallized and thermo mechanically affected zone (TMAZ) was observed through rotation speed 1800 rpm. The friction stir welded ultimate tensile strength Decreases as the volume fraction increases of SiCp (18 wt.%).

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VASCO 9-4-20

Alloy Digest ◽

10.31399/asm.ad.sa0489 ◽

1997 ◽

Vol 46 (10) ◽

Keyword(s):

Fracture Toughness ◽

Tensile Strength ◽

High Temperature ◽

Ultimate Tensile Strength ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

High Tensile Strength ◽

Temperature Performance

Abstract Vasco 9-4-20 (0.20 wt% C) is a premium quality aircraft steel that combines high tensile strength with good fracture toughness. It is a heat-treatable alloy capable of developing an ultimate tensile strength greater than 190 ksi. 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 as well as heat treating, machining, and joining. Filing Code: SA-489. Producer or source: Vasco, An Allegheny Teledyne Company.

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Dramatically Enhanced Combination of Ultimate Tensile Strength and Electric Conductivity of Alloys via Machine Learning Screening

SSRN Electronic Journal ◽

10.2139/ssrn.3646448 ◽

2020 ◽

Author(s):

Hongtao Zhang ◽

Huadong Fu ◽

Xingqun He ◽

Lei Jiang ◽

Long-Qing Chen ◽

...

Keyword(s):

Machine Learning ◽

Tensile Strength ◽

Ultimate Tensile Strength ◽

Electric Conductivity

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Comparison of yield strength, ultimate tensile strength and shear strength on the annealed and heat-treated composites of stainless steel with fly ash and ZnO

Materials Today Proceedings ◽

10.1016/j.matpr.2021.03.145 ◽

2021 ◽

Author(s):

T. Sathish ◽

Sujin Jose Arul ◽

Gopal Kaliyaperumal ◽

G. Velmurugan ◽

De Poures Melvin Victor ◽

...

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Shear Strength ◽

Fly Ash ◽

Ultimate Tensile Strength ◽

Yield Strength ◽

Heat Treated

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Vibratory weld conditioning during gas tungsten arc welding of al 5052 alloy on the mechanical and micro-structural behavior

World Journal of Engineering ◽

10.1108/wje-06-2020-0211 ◽

2020 ◽

Vol 17 (6) ◽

pp. 831-836

Author(s):

M. Vykunta Rao ◽

Srinivasa Rao P. ◽

B. Surendra Babu

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Tensile Strength ◽

Ultimate Tensile Strength ◽

Welded Joints ◽

Great Influence ◽

Welding Process ◽

Microstructural Characterization ◽

Content Type ◽

Average Grain Size

Purpose Vibratory weld conditioning parameters have a great influence on the improvement of mechanical properties of weld connections. The purpose of this paper is to understand the influence of vibratory weld conditioning on the mechanical and microstructural characterization of aluminum 5052 alloy weldments. An attempt is made to understand the effect of the vibratory tungsten inert gas (TIG) welding process parameters on the hardness, ultimate tensile strength and microstructure of Al 5052-H32 alloy weldments. Design/methodology/approach Aluminum 5052 H32 specimens are welded at different combinations of vibromotor voltage inputs and time of vibrations. Voltage input is varied from 50 to 230 V at an interval of 10 V. At each voltage input to the vibromotor, there are three levels of time of vibration, i.e. 80, 90 and 100 s. The vibratory TIG-welded specimens are tested for their mechanical and microstructural properties. Findings The results indicate that the mechanical properties of aluminum alloy weld connections improved by increasing voltage input up to 160 V. Also, it has been observed that by increasing vibromotor voltage input beyond 160 V, mechanical properties were reduced significantly. It is also found that vibration time has less influence on the mechanical properties of weld connections. Improvement in hardness and ultimate tensile strength of vibratory welded joints is 16 and 14%, respectively, when compared without vibration, i.e. normal weld conditions. Average grain size is measured as per ASTM E 112–96. Average grain size is in the case of 0, 120, 160 and 230 is 20.709, 17.99, 16.57 and 20.8086 µm, respectively. Originality/value Novel vibratory TIG welded joints are prepared. Mechanical and micro-structural properties are tested.

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Effects of Substitution of Y with Yb and Ce on the Microstructures and Mechanical Properties of Mg88.5Zn5Y6.5

Metals ◽

10.3390/met11010031 ◽

2020 ◽

Vol 11 (1) ◽

pp. 31

Author(s):

Hongxin Liao ◽

Taekyung Lee ◽

Jiangfeng Song ◽

Jonghyun Kim ◽

Fusheng Pan

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Tensile Strength ◽

Ultimate Tensile Strength ◽

Yield Strength ◽

Creep Resistance ◽

Room Temperature ◽

High Thermal Stability ◽

Long Period ◽

Microstructures And Mechanical Properties

The microstructures and mechanical properties of the Mg88.5Zn5Y6.5-XREX (RE = Yb and Ce, X = 0, 1.5, 3.0, and 4.5) (wt.%) alloys were investigated in the present study. Mg88.5Zn5Y6.5 is composed of three phases, namely, α-Mg, long-period stacking ordered (LPSO) phases, and intermetallic compounds. The content of the LPSO phases decreased with the addition of Ce and Yb, and no LPSO phases were detected in Mg88.5Zn5Y2.0Yb4.5. The alloys containing the LPSO phases possessed a stratified microstructure and exhibited excellent mechanical properties. Mg88.5Zn5Y5.0Ce1.5 exhibited the highest creep resistance and mechanical strength at both room temperature and 200 °C, owing to its suitable microstructure and high thermal stability. The yield strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature was 358 MPa. The ultimate tensile strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature and 200 °C was 453 MPa and 360 MPa, respectively.

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Microstructural Characterization of Laser Weld of Hot-Stamped Al-Si Coated 22MnB5 and Modification of Weld Properties by Hybrid Welding

Materials ◽

10.3390/ma14143943 ◽

2021 ◽

Vol 14 (14) ◽

pp. 3943

Author(s):

Hana Šebestová ◽

Petr Horník ◽

Šárka Mikmeková ◽

Libor Mrňa ◽

Pavel Doležal ◽

...

Keyword(s):

Tensile Strength ◽

Ultimate Tensile Strength ◽

Fusion Zone ◽

Microstructural Characterization ◽

Tensile Tests ◽

Laser Weld ◽

Martensitic Microstructure ◽

Laser Welds ◽

Weld Properties ◽

Weld Fusion Zone

The presence of Al-Si coating on 22MnB5 leads to the formation of large ferritic bands in the dominantly martensitic microstructure of butt laser welds. Rapid cooling of laser weld metal is responsible for insufficient diffusion of coating elements into the steel and incomplete homogenization of weld fusion zone. The Al-rich regions promote the formation of ferritic solid solution. Soft ferritic bands cause weld joint weakening. Laser welds reached only 64% of base metal's ultimate tensile strength, and they always fractured in the fusion zone during the tensile tests. We implemented hybrid laser-TIG welding technology to reduce weld cooling rate by the addition of heat of the arc. The effect of arc current on weld microstructure and mechanical properties was investigated. Thanks to the slower cooling, the large ferritic bands were eliminated. The hybrid welds reached greater ultimate tensile strength compared to laser welds. The location of the fracture moved from the fusion zone to a tempered heat-affected zone characterized by a drop in microhardness. The minimum of microhardness was independent of heat input in this region.

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