Search results

The effect of tribological properties of laser-textured with different surface coverage and diameters on HA/ZrO2 coating is studied.
Introduction Bio-ceramics have increasingly application due to their good mechanical properties and bio-compatibility [1].
All these factors lead to the larger friction coefficient and higher depth.
Original surface b.4N c.8N d.12N Conclusion The friction property of textured samples is affected by surface coverage rates and circular dimple diameters as well as the lubricant.
Micro-dimple Surface Texture Picosecond Laser Processing and Tribological Properties[J].

Many research has been reported both in experimental and theoretical venues, concerning the interaction between various factors and proposing some models [17-19].
Pan et al. studied the mechanical properties of blended PA66/PP and CO/PET yarns [19].
That is while, the prediction of the tensile strength of the hybrid nanofiber yarn, which is affected by the properties of its components, is of critical importance.
Mechanical Properties: Strength and elongation at break of nanofiber yarns were measured and brought in Table 2.
[19] Pan, N., Chen, K. (2000), “Studying the Mechanical Properties of Blended Fibrous Structures Using a Simple Model”, Text Res J, 70, pp. 502-507

Based on the chemic reactivity properties between fly ash and cement, an appropriate concrete strength model are chosen, and a new model for the fly ash strength factor combing Maturity method is built up and the factors are regressed by existing experimental datum.
The effect of fly ash in improving the mechanical properties of concrete is investigated by experimental study.
Based on the chemic reactivity properties between fly ash and cement, an appropriate concrete strength model are chosen, and a new model for the fly ash strength factor combing Maturity method is built up and the factors are regressed by existing experimental datum.
The physical properties of cements are given in Table 1.
[5]Bijen, J., Selst ,R.V., Cement Equivalence Factors for Fly Ash[J].

In this paper, yttrium aluminum garnet (YAG) – magnesium aluminate spinel (MAS) with good mechanical strength is fabricated by directional solidification, and its microstructure and mechanical properties were investigated.
Introduction Directionally solidified eutectic ceramics show superior mechanical properties.
Residual stress is attributed to failure behaviors in directionally solidified eutectic ceramic composites because the stresses ultimately affect the mechanical behavior of the melt growth composites (MGC).
Singh, Influence of fiber and interfacial properties on fracture behavior of fiber-reinforced ceramic composites, J.
Hirano, Application of eutectic composites to gas turbine system and fundamental fracture properties up to 1700 °C, J.

Crack often takes place in the heat affected zone area.
However, many factors influence the preheating method due to the complexity of welding structure.
Mechanical properties were conducted by performing Vickers micro hardness testing, while SEM was used for fractography and micro-analysis of the crack surface.
Technical data of mechanical properties of each material are shown in Table 1 and the chemical composition of materials is shown in Table 2.
Many investigations have been done in determination of interacting factors on cold cracking.

According to the real operation situation, the multi-factor aging test sequence with electric field, temperature field, mechanical vibration and thermal cycling was developed, and the test platform with multi-factor aging was built in this research.
It generally occurs in one or more air gap in the insulation medium, and it doesn’t affect the short-term electric strength of electrical equipment.
But few reports obtained a clear conclusion about the relationship between residual life and multiple factors.
In this research, the multiple factors test (set multiple factors at same time) was carried out, the partial discharge of the stator bar was investigated during the tests.
TC—thermo-cycling T—temperature field EL—electric field V—mechanical vibration VT—test Fig.2 Multi-factor aging test model The Fig.2 shows the multi-factor aging test sequence.

The composites were evaluated by their physical and mechanical properties.
Moreover, they present superior properties than its isolated constituent materials.
For elasticity modulus (MOE) in static bending there was significant interaction between the factors (Table 2).
For rupture modulus (MOR) in static bending, there was no significant interaction between factors (Table 2).
The composites without chemical modification showed good results for physical and mechanical properties.

Yang et al. [12] studied the microstructure and mechanical properties of a Ni-based superalloy with refined grains.
In this paper, the mechanism that Microcast-X fine grain casting affects microcrystalline microstructure and mechanical properties of K492M alloy was studied compared with conventional casting.
Discussion Compared with single crystal superalloy, the factors affect mechanical property of material are more complex, including grain size, dendrite arm spacing and secondary strengthening phase such as γ′ phase and carbide.
Gai, Investigation on mechanical properties of fine grain cast by mould agitation, J.
Hu, Microstructure and mechanical properties of a ni-based superalloy with refined grains, Acta.

This study attempts to determine some of the factors leading to the occurrence of SCC in high pressure natural gas transmission pipelines operating in Australia.
The SCC properties of ferritic steel pipes of the same grade were considered in relation to texture in [9] with conclusions coinciding with ours.
Though there are small differences is hardness, residual stress, and mechanical properties, this zone extends only 0.5 mm deep under the surface.
Law: Investigation of line pipe properties on SCC susceptibility of pipelines, APIA report 07-07
Mecking, Texture and Anisotropy: Preferred Orientations in Polycrystals and their Effect on Materials Properties, Cambridge University Press, 2000

A large number of factors affect the diffusible hydrogen amount in a welded joint.
Among other factors affecting the amount of diffusible hydrogen in deposited metal when using flux cored wires are: consumables storage conditions (especially for flux cored wires with seam) and the chemical composition of the wire [6,11,15].
Still, other factors give the opposite effect.
Whereas other factors affect the depended variable in reverse.
Decreasing the diffusible hydrogen content in samples is limited by the necessity of welding in a stable manner and achievement of the desired mechanical properties of joints. 5.