The Preparation and Properties Study of the Zirconia Dispersion-Strengthened Platinum Materials

2013 ◽  
Vol 873 ◽  
pp. 19-23
Author(s):  
Hui Yi Tang ◽  
Bao An Wu ◽  
Qin Bin Liu ◽  
Bu Ying Zhai ◽  
De Mao Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Relative Density ◽  
Electromotive Force ◽  
Resistance Ratio ◽  
Thermal Electromotive Force ◽  
Pure Platinum ◽  
Maximum Tensile Strength ◽  
Processing Rate ◽  
Measuring Accuracy ◽  
Platinum Thermocouple

s: The zirconia dispersion-strengthened platinum thermocouple materials were successfully fabricated by powder metallurgic method. It was studied the zirconia grains influences on platinum materials. The results of the study show that its density is 21.4g/cm3 and its relative density is 99.8%. Its tensile strength obvious overtop pure platinum, the maximum tensile strength is 930MPa. The cures of tensile strength with the processing rate improved of the materials obey a analogy-linear law. The resistance ratio (R100/R0)1.3922, and thermal electromotive force of Pt matched PtRh10 meet I measuring accuracy grade relative to GB/T1598-2010 stander.

scholarly journals II. The elastic limits of iron and steel under cyclical variations of stress

1911 ◽  
Vol 210 (459-470) ◽  
pp. 35-55 ◽  
Keyword(s):  
Tensile Strength ◽  
Yield Stress ◽  
Simple Relation ◽  
Iron And Steel ◽  
Maximum Tensile Strength

Introduction . Since Wöhler’s original experiments on the fracture of iron and steel by repetition of stress, similar experiments have been made by independent observers, and all agree in showing that neither the maximum tensile strength nor the yield stress hears any simple relation to the range of stress which may be safely repeated. The only theory of fatigue, i . e . of failure due to repetition of stress, which has received serious attention was put forward by Bauschinger. According to this theory, specimens subjected to repetitions of stress begin to be fatigued when the stresses applied in each cycle are so great that the extension of the specimen is not wholly elastic.

scholarly journals The Optimum Process Parameter of Dissimilar Metal AA6061 – AISI304 Continuous Drive Friction Welding

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Totok Suwanda ◽  
Rudy Soenoko ◽  
Yudy Surya Irawan ◽  
Moch. Agus Choiron
Keyword(s):  
Tensile Strength ◽  
Response Surface ◽  
Process Parameters ◽  
Friction Welding ◽  
Welding Parameters ◽  
Optimum Process ◽  
Dissimilar Metals ◽  
Maximum Tensile Strength ◽  
Friction Pressure ◽  
Welding Processes

This article explains the use of the response surface method to produce the optimum tensile strength for the joining of dissimilar metals with the continuous drive friction welding method. The joining of dissimilar metals is one of the biggest challenges in providing industrial applications. Continuous drive friction welding has been extensively used as one of the important solid-state welding processes. In this study, the optimization of the friction welding process parameters is established to achieve the maximum tensile strength in AA6061 and AISI304 dissimilar joints via the response surface methodology. The effect of continuous drive friction welding parameters, which are friction pressure, friction time, upset pressure, and upset time, are investigated using response surface analysis. The design matrix factors are set as 27 experiments based on Box-Behnken. The 3D surface and the contour is plotted for this model to accomplish the tensile strength optimization. The optimization model of the tensile strength was verified by conducting experiments on the optimum values of the parameters based on the experimental data results. It can be denoted that the optimum process parameters settings were friction pressure = 25 MPa, friction time = 6 seconds, upset pressure = 140 MPa, and upset time = 8 seconds, which would result in a maximum tensile strength of 228.57 MPa.

scholarly journals Manufacturing Technique of Heat-Insulating and Flame-Retardant Three-Dimensional Composite Base Fabrics

2013 ◽  
Vol 8 (1) ◽  
pp. 155892501300800
Author(s):  
Jia-Horng Lin ◽  
Chen-Hung Huang ◽  
Ching-Wen Lin ◽  
Ching Wen Lou
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Melting Point ◽  
Flame Retardant ◽  
Three Dimensional ◽  
Weight Ratio ◽  
Air Permeability ◽  
Maximum Tensile Strength ◽  
Manufacturing Technique ◽  
Pu Foam

In this research, we create a PET/TPU/PU composite base fabric from a PET nonwoven base fabric, a TPU honeycomb grid, and a PU foam plank. First, the PET base fabric is made from 7D three-dimensional-hollow-crimp fiber (7D PET) and low-melting-point (low-Tm) fibers with weight ratio and number of lamination layers as the parameters. The hardness and rebound resilience rate of the PET nonwoven base fabric are 71% and 63.5%, respectively. The PET nonwoven base fabric's optimum air permeability is 240 cm3/s/cm2. The maximum tensile strength of the PET nonwoven base fabric with 9 layers of lamination is 39.8 kg/cm2, and when the weight ratio is either 4:6 or 3:7, changes to 40 kg/cm2. The PET/TPU/PU composite base fabric has a LOI of 33 when the number of lamination layers is 10, or when the low-Tm fiber content is 50%; the composite base fabric's average optimum thermal conductivity is 0.914 W/mK.

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