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The thermal operation of hardening is used to give steel strength, hardness, elasticity, i.e. improve its mechanical properties.
The presence of ferrite reduces the hardness of the steel after quenching and its mechanical properties after tempering.
Effect of AFSH on the properties of steels.
The influence of additional frictional strain hardening on the properties of steels.
Natarajan, Effect of process parameters on thermal history and mechanical properties of friction stir welds.

The quality of the products from sheet metal forming is severely influenced by the die design, material properties of sheet metal, lubricating condition, and other processing parameters.
If the controllable variables are not chosen properly or they do not match with the variances of the noise factors, the sheet metal forming process may turn out products with defects such as fracture, wrinkling, thinning or thickening.
Today forming simulations are mainly used in a trial and error fashion in order to develop forming processes that can produce parts with the requested properties.
Mechanical properties and material formability parameters are shown in the Table 1.
Table 1 Mechanical properties of AISI430 stainless sheet with thickness of 0.4 mm Direction [°] Rp0,2 [MPa] Rm [MPa] Ag [%] r [-] rn [-] n [-] nm [-] C [MPa] 0 330 502 20.2 0.95 1.08 0.200 0.20 843 45 365 541 20.0 0.90 0.204 90 361 549 19.9 1.40 0.197 Final deep-drawn part with diameter of 490 mm was manufactured from the circular blank with diameter of 590 mm.

Chitosan is available in a wide range of molecular weights and degrees of deacetylation, which are the main factor affecting the particle size, particle formation and aggregation [3].
The chemical fixation treatment applied to cellulose fibers is known as durable press finishing (DP) and it is of increasing interest in textile industries as to increase textile properties, such as anti-odour, low-shrinkage capacities and wrinkle resistance, as well as antimicrobial properties.
These materials have several constraints like the reduction of mechanical properties, fiber degradation, but above all, the release of toxic and irritant formaldehyde vapours during DP process and even during storage [6, 7].
Results and discussion Tensile Strength of Composite Fibers Influence of three types of chitosan compounds on mechanical properties of composite fibers is illustrated in Fig 3.
Spray dried chitosan (SP) and soybean oil-g-chitosan (SB) could impart the increased tensile strength properties of composite fiber.

On the other hand, one of the input factors for the electrical discharge machining is the workpiece material machinability.
As a rule, the machinability is the technological property of the workpiece material to be machined in the best conditions for the producer; this means that the material could be machined with high material removal rate, with a low wear of the tool, with a minimum mechanical solicitation of the machining equipment, with obtaining a low roughness of the machined surface, with a convenient form of the detached chips.
It is expected that during the electrical discharge machining, the electrode wear is influenced by various factors; these factors could be grouped in factors which characterize the workpiece material (the melting temperature, the vaporizing temperature, the thermal conductivity, the thermal capacity), the values of the machining electrical parameters (pulse frequency, duration of the electric pulse, duration of the pause between two successive electric pulses, mean value of the electric intensity), the characteristics of the dielectric fluid and the way in which the electric fluid accedes in the work zone (by immersion, through the electrode, by injection or suction), the way in which the particles of detached material from electrodes are removed from the machining zone, the motions specific to the machining schema.
Being a factor of main technological interest, the electrode wear was a subject of the researchers preoccupations.
He considered that the electrode wear could be appreciated by means of two measurements, namely the end wear and the corner wear [4]; he formulated also the opinion that due to the use of transistorized, pulse-type power supplies, the electrolytic copper could be preferred as electrode material, due to its favorable properties from the requirements of technological interest.

The control factors in this method are the distance between the two heat sources, Xh, and the heat input of the back heating source, Qback.
The physical and mechanical properties of the steel used for the heat condition and thermal stress analysis are shown in Figure 3(a) and 3(b).
These properties were determined by considering the temperature dependence of the material.
(a) Physical properties.
(b) Mechanical properties.

Tensile curves of the material at a room temperature of 400℃ are shown in Fig.1 and the mechanical properties are shown in Table 1.
The crack growth in MSC stage is mainly affected by the structural factors, but the crack growth in PSC stage which is mainly affected by mechanical factors.
The short cracks evolution behavior under the leadership of mechanical factors tends to be regular and simple.
The increase of strain amplitudes will strengthen the effect of mechanical factors, making the crack growth rate more stable and the damage evolution degree more regular.
Strain amplitudes as one of mechanical factors will effect the growth rate of the fractal dimension.

The influence factors of thin-walled parts processing precision There are many factors affecting the machining precision of thin-wall parts, of which the main influence factors are the following: (1) The stress and deformation.
In view of the above factors in machining of thin-walled parts, the following through processing in practice to show that improving the thin-wall parts machining accuracy and efficiency measures.
There are many factors influencing the stiffness of thin-walled parts, positioning, such as when the workpiece machining clamping form, tooling, clamping force etc..
At the same time, the magnitude of the cutting force is also influenced by the geometric angle of the cutter, usually the rake angle size affects the cutting deformation and tool rake angle and the sharp degree
A processing technology of [J]. mechanical prevent processing thin-walled flexible deformation of parts manufacturing. 2013 (01) [4] Jiushu Yang, Daxin Li, Xiulin Yang g, Feng leather.

In this paper the finite element method is used to analyze dipper handle and find out the weakness in the structure and factors impacting the service life of dipper handle.
Sometimes many factors on dipper handle structure have to be assumed and simplified, some difficult points are also neglected to satisfy with the calculation conditions in strength check [5,6].
According to structure properties and load conditions, fracture reasons of dipper handle had been found out by utilizing finite element model to analyze the stress.
Fig.5 Stress diagram of dipper handle Fig.6 Time history of dipper handle Improved dipper handle The original Q235 steel as material of dipper handle can not meet the nowadays requirements. 16Mn and 15MnV all have better mechanical properties which have almost the same market price.
But 15MnV steel mechanical properties are better than 16Mn steel.

ZHOU et al[2] studied factors affecting cyclic loading which contain cyclic stress ratio, loading frequency and other factors.
The soil stratification and physic-mechanical properties is shown in table 1.
Table 1 Soil stratification and physic-mechanical properties Index Soil stratum w（%） γ(kN/m3) Ip Il C(kPa) φ(°) Es(MPa) fk(kPa) qsa(kPa) qpa(kPa) 1 undisturbed soil 2 Silty clay 27.1 18.8 15.8 0.343 31.3 17.7 5.0 120 16 4 Silty clay 21.1 19.5 13.3 0.333 29.7 14.1 10.0 200 20 6-1 Highly weathered limy siltstone 29.1 19.2 21.0 0.247 31.8 11.8 8.0 300 25 6-2 Strongly weathered limy siltstone 500 35 6-3 Intermediary weathered limy siltstone 1000 50 3000 Note: w is natural water content of soil; γ is natural unit weight of soil; Gs is specific gravity of soil; e is void ratio of soil; IP is plasticity index of soil; IL is liquidity index of soil; C is cohesive strength of soil; φ is internal frictional angle of soil; Es is modulus of compressibility of soil; fk is calculated ground bearing capacity; qsa is limit frictional resistance; qpa is ultimate tip resistance.

"Mechanical properties and porosity of polylactide for biomedical applications."
Improvements in the crystallinity and mechanical properties of PLA by nucleation and annealing.
E., & Kontopoulou, M., Improvements in the crystallinity and mechanical properties of PLA by nucleation and annealing.
"Thermal and mechanical properties of stereocomplex polylactide enhanced by nanosilica."
"Effect of nano SiO2 on some mechanical properties of biodegradable polylactic acid."