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Effect of activated TIG flux on performance of dissimilar welds between mild steel and stainless steel Cheng-Hsien Kuo1, Kuang-Hung Tseng2* and Chang-Pin Chou1 1Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan 2Department of Materials Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan * tkh@mail.npust.edu.tw (corresponding author) Keywords: Oxide flux, TIG process, Dissimilar joint Abstract.
This approach is most often used where a transition in mechanical properties and/or performance in service are required.
According to work by Heiple and Roper [9], the direction of fluid flow in the molten pool can affect the weld geometry.
The temperature coefficient of surface tension is a factor in driving the direction of fluid flow in the molten pool.
The degree of angular distortion depends on several factors such as the relative weld depth and the shape and dimensions of weld metal [10,11].

High mechanical strength and weather conditions resistance expands their range of applications.
However composite must be properly prepared in order to gain desired properties.
The selection of laminate epoxy matrix - carbon is a very important factor.
It directly affects the strength of the composite.
The choice of resin used in laminate production depends on many factors.

Previous studies considered that soil moisture was an important factor which driving the cycle succession of A. ordosica community.
Soil moisture at 10 cm deep is affected by precipitation most obvious, soil moisture content can reach 15% quickly after large precipitation enents (> 10 mm rainfall), and then gradually decline to 5%.
Mechanical disturbances such as stock trampling and vehicle traffic cause changes in crust cover and composition, with severe or repeated disturbance resulting in complete crust removal.
The development of BSC in A.ordosica communities could significantly improve the soil physicochemical properties and affect the redistribution process of precipitation.

Void percentage is one of the main diagnostic and quality factors for printed circuit board (PCB) soldering.
Void percentage as a quality factor.
This affects particularly the produced quality of the PCBs and the circuit connectivity.
Table 1 shows the basic properties of the reference environment and their values used to perform the exergy calculations.
[13] Standard thermodynamic properties of chemical substances, 2014, http://courses.chem.indiana.edu/c360/documents/thermodynamicdata.pdf (2014)

Table 2 shows experimental results of tensile properties.
Similarly, the anisotropy of mechanical properties is calculated by: ⊿r=( r0 +r90-2r45)/2.
The urethane pre-coating produced different changes in mechanical properties, namely, a significant increase in proof stress and a minimal change in elongation.
The kinetic viscosity of Mu-19 (Mu) is 22.3 cst. [3] GG has the best lubricating properties.
Punch diameter dp φ40 Punch profile radius rp 8mm Clearance 20.0% Die profile radius rd 3mm Hold-down force 1kN Punch velocity 100mm/min Table.2 Mechanical properties of specimens.

The elastic connecting system between an engine and the car body, which is called Engine mounting system, would affect the riding comfort and service life of a car.
Piezoelectric Stack Actuator When piezoelectric materials are being pressed, they will produce a voltage whose value proportionates to the pressure, which is called piezoelectric effect; On the contrary, when the voltage applied to them, they can form mechanical deformation, which is called inverse piezoelectric effect.
The nonlinear factors, especially hysteresis, can decrease the accuracy and stability of the system.
For instance, since there is no property of hysteresis in the relation curve between the inter electrode charge and displacement of a piezoelectric stack , we can apply feedback control method to eliminate or compensate the hysteresis loop .
Based on the piezoelectric actuator power assembly active suspension mechanical model as figure3 and figure 4 shows, the formula as follows: (2) Among them, ma is the middle quality, ke and ce is the stiffness and damping of rubber suspension, ka is amplification mechanism of equivalent stiffness of piezoelectric pile, za(t) is the middle quality displacement, yh(t) is the active suspension output displacement.The active vibration isolation system of the active suspension power train has a structure as figure 4 shows. f(t) is the disturbing force the power train suffers, xe,xa and xs are quality of the power train, intermediate quality of the active mounting device and the displacement of the car body quality. ke and ce are stiffness and damping coefficient of the main rubber spring. ka is the stiffness of piezoelectric actuators. ks and cs represent stiffness and damping of the suspension.

For reliable operation in such extreme conditions, it is necessary that the material of the parts obtained by 3D printing has cold resistance, i.e. retained its mechanical properties and remained plastic at low temperatures [5-10].
Despite the appearance of a number of publications on the study of the structural features and properties of metals obtained on the basis of 3D printing technology, there are currently no such studies carried out in this work [14-15].
Impact bending test results of steels As the analysis of the results of testing steel samples for impact bending, cut along and across the direction of surfacing, has shown, steel 08Mn2Si has a rather low anisotropy of properties ~ 4%, for steel 07Cr25Ni13 this indicator is ~ 8%.
To simplify the analysis and systematization of the data obtained during the test, as well as after processing the image of the fracture of the sample, it is advisable to load the data into a special "Database of mechanical properties and fracture parameters of materials obtained on the basis of 3D printing".
Merkushev, Analysis of the structure and mechanical properties of the Co – Cr – Mo alloy obtained by 3D printing, Physics of Metals and Metal Science. 120(12) (2019) 1271-1278

Austenitic stainless steels are found to be efficient engineering materials with excellent mechanical properties which highly suitable for making of different industrial components [2, 3].
Ramachandran, Effect of friction stir welding on mechanical and microstructural properties of AISI 316L stainless steel butt joints.
Lakshminarayan, Enhancing the properties of friction stir welded stainless-steel joints via multi-criteria optimization.
Mechanical properties of AISI 316L austenitic stainless steels welded by GTAW.
Effect of TIG welding and manual metal arc welding on mechanical properties of AISI 304 and 316L austenitic stainless-steel sheets.

Experimental results, carried out in a standard computer, verify its effectiveness where it utilizes the privileges of image constitutional depicting, allowing extraction of the most powerful key points since it preserves robustness of co-registration process using image frequency properties which are not variant to illumination.
Based on the properties of structure stability and informativeness; the usage of local features is preferred since the process of distinguishing a group of noteworthy points can be achieved where the points have specific properties [6-11].
They have properties of providing a representative set of points with highly repeatable in the scale dimension and being insensitive to scale, illumination, rotation, and noise variations.
The privileges of image constitutional depicting allow to detect and extract the most powerful keypoints since it preserves robustness of co-registration process where the frequency properties of the image are not variant to illumination or noise changes.
[12] K Y Kok and P Rajendran, Validation of Harris Detector and Eigen Features Detector, International Conference on Aerospace and Mechanical Engineering (AeroMech17), 370 (2018)

However, a large obstacle for applications of DLC film is its low adhesiveness to various substrates, which is caused by two main factors: intrinsic residual stress and stable carbon bonds [2].
In previous studies, the formation of a hydrogen-containing DLC (a-C: H) /a-SiC layered thin film was achieved, and the effects of an a-SiC interlayer on its structure and mechanical properties were determined.
Robertson, Properties of Diamond-Like Carbon, Surf.
Shi, “Effectsn on deposition and mechanical properties of diamond-like carbon film using inert gases in methane plasma,” Thin Solid Films, Vol. 377-378, (2000) 198-202
Kato, Evaluation and Prediction of Mechanical Properties of DLC Films by Raman Spectroscopy (Part 2), J.