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Some data about the 17-4 PH stainless steel are available; they are however mainly focused on the influence of heat-treatments and related microstructural characteristics on the room-temperature fatigue properties [1-8].
The mechanical properties at room temperature determined for the as-received material by AUBERT & DUVAL are given in Table 1.
Table 1: Mechanical properties of 15-5PH Stainless Steel in AR condition at room temperature FCG tests were carried out on a commercial closed-loop servohydraulic test machine at room temperatures and at 300°C in laboratory air.
As observed at ambient temperature, ageing does not affect the FCGRs at 300°C over the entire extent of the stable propagation domain.
· As in room temperature, ageing does not affect the FCGRs in the stable propagation domain at high temperature.

Particularly, NbSS/Nb5Si3 in-situ composites exhibit the highest potential in term of mechanical properties.
However, limited reports are available on the tensile properties and fracture behavior at high temperatures.
In this study, we investigate the alloying effects of 2mol%-C and -W on the microstructure and mechanical properties of the NbSS/Nb5Si3 in-situ composite, Nb-18Si-5Mo-5Hf, which shows a good tolerance to fractures [13].
Tensile Properties.
Accordingly, these three factors; interface cracks, NbSS stretching and NbSS hardening, may contribute to high tensile strength of SMHW at 1473K.

Again, compatibility characteristics and properties of biodiesel fuel are important for materials on the engine parts, and little information is available on this aspect.
The fuel evaluation properties of the biodiesel fuel (B100) purchased still need to be conducted to assure the quality of the fuel is following the standard method, ASTM D6751[12].
As a result, the identified factors promoting material degradation such as water content, total acid number and oxidised products determined from these standards may not necessarily be present in the actual fuel system.
Thus these factors lead to a great practical barrier that proving compatibility and durability are generally very expensive.
The sampling points were located before and after the tested piece for fuel properties determination and results comparison purposes.

So, GFRP pipe properties for the design such as pipe stiffness (PS) and equivalent modulus of elasticity (Eeq) is complicated to predict or to measure.
Internal pressure performance is affected by glass fiber reinforced polymer plastic layer and the stiffness factor (EI) is affected by polymer mortar layer.
The quantities pipe stiffness (PS) and stiffness factor (SF) are computed values determined from the test resistance at a particular deflection.
Therefore, the theoretical equation may also be used to predict the pipe stiffness factor.
Lee, Mechanical Properties and Structural Behavior of GRP Composite Pipe for Water Supply and Drainage, M.S.

The Issues on the BF Application in the Bridge Engineering The above information shows that the mechanical characteristics of the BF concrete should be strengthened, the research on the basalt fiber concrete mechanical property is just beginning in the field of fiber reinforced concrete[19,20].
Research on mechanical properties of BF reinforced beams.
Many factors affect the fiber material reinforcement effect, including the layers of FRP, reinforcement spacing, treatment methods of component surface, sheet thickness, stress level of existing structures, etc.
From test results, the main factors which affect the basalt fiber reinforcement effect can be identified.
At the same time, we can master the mechanical properties of basalt fiber reinforcement of existing bridges systematically by comparison test.

It is found that an array with properties of high uniform density, low amorphous carbon content and highly aligned nano-tubes are better spinnable.
One of the limiting factors of sytems that uses piezoelectric patches is the size of the patches.
Discovery of carbon nanotubes and their fascinating properties have opened many probable applications for them.
The properties of sensor as crack detection show promise.
Schulz, The Effect of Substrate and Catalyst Properties on the Growth of Multi-Wall Carbon Nanotube Arrays, Materials Research Society, Fall Meeting, 2005.

Mechanical Properties of Stone Mastic Asphalt Incorporating Nano Titanium Modified Asphalt Binder Mohd Safwan Hakim Norbi1,a, Khairil Azman Masri1,b*, Nur Syafiqah Shamimi Mohd.
This study focuses on the mechanical properties enhancement of SMA with the existence of nano-titanium (TiO2) modified asphalt binder.
These reflect to the improvement of bitumen properties.
Shafabakhah, 2016, "Evaluating mechanical properties of stone mastic asphalt modified with Nano Fe2O3."
Mechanical properties of porous asphalt with nano silica modified binder.

The mechanical properties obtained from smooth flat samples of the BM, in accordance with ASTM E 8M, were about: 740 MPa for yielding stress (0.2% offset); 809 MPa for ultimate strength; 669 MPa for rupture stress; 8.5% for elongation (in 25 mm length), 0.91 for yielding stress/ultimate strength ratio and 65 HRA hardness in the “as-received” condition.
Weld geometry factors.
Table 2 presents the main geometric factors affecting the fatigue resistance of a welded joint.
Table 2: Geometric factors of the weld bead.
Ph.D Thesis in Mechanical Engineering.

Based on the necessary relationship between the strength and the water content of unsaturated soil, combined with real foundation pit in unsaturated soil, firstly, physical and mechanical parameters of soil samples with different water content are obtained through triaxial test.
Summary of FEM software At present, there are more and more foundation pit engineerings being simulated and analyzed by using FEM, because many influencing factors can be considered in this method simultaneously[3].
Due to geometric model is of symmetry properties, one-half of model is selected to perform numerical analyses, in which the width is 70m, and the depth is 55m, thereinto, the width and depth of foundation pit is respectively 25m and 16m.
Obviously, ground deformation is affected by the variation of water content largely.
Obviously, support pile’ deformation is affected by the variation of water content severely.

Second, the contents of element C of si-steel was low, its microstructure was the main ferrite and the less austenitic at high temperature,the crystal grain of welding heat affect zone grew up during welding,and the dimension of crystal grain was retained during cooling, leading to the big crystal grain in the welding heat affect zone; Finally,the welding seam produced easily bainite and M-A microstructure during cooling due to the Si element and the smaller welding energy.
So,the toughness of welding seam was low,the performance of welding seam and heat affect zone were lower thanthe base mental.
The mechanical properties of welding line was tested by tensile and repeated bend tests, Repeated bend test according to the GB/T235 -1999, the sample width 20mm, bending radius 15mm, 90 degrees bending angle.
Conclusions Utilize the Trumph TLF12000 fast-flow CO2 laser, the laser welding characteristic and mechanical performance of 50ww600 hot rolling Si-steel strip have been studied experimentally.
Mechanical Properties in an Inter-critically Heat-treated Bainite-transformed 2%Si Steel.ACTA Metallurgica Sinica,2004,17(5):725~731