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Effect of Thermomechanical Treatments on the Mechanical Properties of New Low-Cost Ti-Fe-Nb-Zr Alloys Mohamed Abdel-Hady Gepreel1,a and Mitsuo Niinomi2,b 1Egypt-Japan University of Science and Technology, Alexandria, 21934, Egypt. 2Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Sendai 980-8577, Japan ageprell@yahoo.com, bniinomi@imr.tohoku.ac.jp Keywords: Ti-alloys, low-cost alloys, biomaterials, mechanical properties, heat treatments Abstract.
The development of new low-cost alloys composed of common elements that show high biocompatibility and mechanical properties matching with human bone is the target of many researches recently.
In this paper, the effect of heat treatments on the fundamental mechanical properties of the newly developed meta-stable β-type Ti-xFe-3Zr-yNb (x=3-8 & y=2-3, at.%) alloys is explored.
The type and amount of the meta stable phases (ω, α ', α '' and β) retained by quenching in the ST process seem important factor to affect the final overall hardness of the alloy.
The Fe-content in the alloys is very effective in controlling the phases constitution and hence the resulted mechanical properties.

Much enhancements on properties of nanocomposite fabricated using bath sonication compared to using high speed mechanical mixing only.
Distribution of nanofillers in the preparation of epoxy/graphene nanocomposites is one of the greatest challenges that affected the final properties of the composites.
Nanocomposite processed by combination method showed more enhancement in flexural strength compared to isolation method due to two factors.
Koratkar, Enhanced mechanical properties of nanocomposites at low graphene content, Small, 6 (2010) 179–183
Goyat, Influence of ultrasonic dual mode mixing on morphology and mechanical properties of ZrO2-epoxy nanocomposite, High Perform.

Based on this, the sensitivity analysis of the factors affecting the pressure carrying of the pipeline, such as the circular size, the axial size, and the depth of the metal loss defect, was carried out.
The constitutive curve of material properties is shown in Fig. 3.
Fig. 3 Constitutive curve of material properties.
(3) The axial size and the depth of the metal loss defect are the main factors affecting the pressure carrying capacity of pipeline.
American Society of Mechanical Engineers, 2006: 103-116

Study on Microstructures and Mechanical Properties of Cold-rolled C-Mn-Si-Al TRIP Steel Zhengyou Tang1, a, Hua Ding1, b 1School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China atangzy@smm.neu.edu.cn, bhding@263.net Keywords: TRIP steel, Si, Al, retained austenite, mechanical properties Abstract.
Mechanical properties were evaluated by conduction tensile tests using INSTRON4206 electron mechanical testing machine.
Table 3 shows the effect of the partial substitution of Si by Al on mechanical properties in A and B steels.
It can be found that two kinds of steels possess superior mechanical properties.
(2) The Al partial substitution of Si in a conventional C-Mn-Si TRIP steel leads to excellent mechanical properties.

Based on the microcosmic analysis of the factors affecting the stable performance of nanofluid, FeO nanofluid was prepared by using the ultrasonic dispersion method.
According to the data of the absorption height and the solution temperature, it is pointed out that there are two factors which might have negative influences on the mass transfer enhancing process.
Nano materials are of special mechanical properties, electrical properties, optical properties, magnetic properties, thermal properties and strong chemical activity due to their small basic particles and their special small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect.
The stability of nanofluid is influenced by many factors during preparation, particularly such as dispersant and ultrasonic conditions.
It can also be found from Fig6 and 7 that there are two negative factors inhibitting the absorption in ammonia bubble absorption process.

For the natural sand is no-viscous bulk solid material with great variation on mechanical properties to traditional embankment filling, now there are some problems on the application of fine sand filling embankment engineering haven’t been analyzed such as the highway performance of fine sand filling embankment.
For the natural sand is no-viscous bulk solid material with great variation on mechanical properties to traditional embankment filling, now there are some problems on the application of fine sand filling embankment engineering haven’t been analyzed such as highway performance of fine sand filling embankment.
Choosing M-C model for filling sand in the sand filling subgrade stability analysis, calculation parameters of sand filling subgrade was from indoor mechanical property of material experiment.
The cohesion c changes from 0KPa to 24KPa, the friction angle changes from 20°to 40°, other factors are the same to being used above, and the safety factor is coming to shown in Fig. 4.
The stability of sand filling subgrade is being affected with the slope ratio, the subgrade height, the presence or absence of the surrounding soil and the thickness of it, the top seal coat, pavement structure etc. if the height is higher than some value, the safety factor will decrease quickly, and the safety factor will also decrease quickly with the increase of slope ratio.

Analyzes of thermal fatigue of hot forging dies were developed and factors influencing it were identified.
These are factors related to the temperature cycle of the mold (preheating temperature, surface temperature of the mold, residence time at peak temperature, cooling rate), basic factors of the material properties of the mold (coefficient of thermal expansion, thermal conductivity, yield strength when hot, resistance to tempering, strength at creep, ductility) and stress-increasing factors (rounding, holes and corners, surface roughness).
The mechanical properties determined by measuring hardness and microhardness.
Kabatskyi, Effect of Exothermic Addition (CuO-Al) on the Structure, Mechanical Properties and Abrasive Wear Resistance of the Deposited Metal During Self-Shielded Flux-Cored Arc Welding.
Puchý, Selected Properties of Hardfacing Layers Created by PTA Technology.

The thermal field generated during welding significantly influences the microstructure and mechanical properties of welded joints.
This technology enhances the ability to control heat input and cooling rates, which are critical factors in preventing welding defects like cracks and excessive grain growth.
This aids in optimizing welding parameters like heat input, welding current, and travel speed to achieve desired mechanical properties and minimize residual stresses.
The discrepancy is primarily attributed to the idealized conditions in the simulation model, which assumed perfect heat transfer without accounting for environmental factors such as heat losses experienced in real-world welding
Higher energy input and slower welding speeds lead to increased peak temperatures, while changes in material properties or welding configurations are reflected through adjustments in k1 and α.

Furthermore, the shoulder coating effects on microstructure and mechanical properties has been investigated.
The three specimens were obtained for evaluating properties of each welded sample.
Another important parameter that affects the mechanical properties of friction stir welded joint is transverse speed(or welding speed) of tool.
In view of mechanical properties, this imperfection has substantial influence on tensile strength.
Ghasemi: The effect of pin geometry on mechanical properties of PP composite Friction Stir Welds.

The relationship between mechanical properties and mechanical stability of retained austenite is also discussed.
Fig. 2 shows the mechanical properties as a function of IBT time at 450 oC,.
Fig. 3 summarizes the mechanical properties of CMnAlCu TRIP-aided steels.
Fig. 2 Variation of the mechanical properties as a function of holding time at 450 oC.
Fig. 3 The mechanical properties of the samples holding at 400 oC , 450 oC and 500 oC for 60s and 150s.