Effect of Soaking Time and Reduction Ratio on Electrical Resistance and Mechanical Properties of ASTM 2219 Alloy

This research presents an investigation of novel textile-based strain sensors and evaluates their performance. The electrical resistance and mechanical properties of seven different textile sensors were measured. The sensors are made up of a conductive thread, composed of silver plated nylon 117/17 2-ply, 33 tex and 234/34 4-ply, 92 tex and formed in different stitch structures (304, 406, 506, 605), and sewn directly onto a knit fabric substrate (4.44 tex/2 ply, with 2.22, 4.44 and 7.78 tex spandex and 7.78 tex/2 ply, with 2.22 and 4.44 tex spandex). Analysis of the effects of elongation with respect to resistance indicated the ideal configuration for electrical properties, especially electrical sensitivity and repeatability. The optimum linear working range of the sensor with minimal hysteresis was found, and the sensor’s gauge factor indicated that the sensitivity of the sensor varied significantly with repeating cycles. The electrical resistance of the various stitch structures changed significantly, while the amount of drift remained negligible. Stitch 304 2-ply was found to be the most suitable for strain movement. This sensor has a wide working range, well past 50%, and linearity (R2 is 0.984), low hysteresis (6.25% ΔR), good gauge factor (1.61), and baseline resistance (125 Ω), as well as good repeatability (drift in R2 is −0.0073). The stitch-based sensor developed in this research is expected to find applications in garments as wearables for physiological wellbeing monitoring such as body movement, heart monitoring, and limb articulation measurement.

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Effects of Cold-Rolling Reduction on Microstructure and Mechanical Properties of Ti50Zr30Nb10Ta10 Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.849.376 ◽

2016 ◽

Vol 849 ◽

pp. 376-381

Author(s):

Ming Long Li ◽

Yu Jie Geng ◽

Chen Chen ◽

Shu Jie Pang ◽

Tao Zhang

Keyword(s):

Mechanical Properties ◽

Titanium Alloy ◽

Plastic Strain ◽

Cold Rolling ◽

Reduction Ratio ◽

High Fracture ◽

Dendrite Structure ◽

Microstructure And Mechanical Properties ◽

Cold Rolling Reduction ◽

Cold Rolled

The effects of cold-rolling with different reduction ratios of 70%-90% on the microstructure and mechanical properties of Ti50Zr30Nb10Ta10 alloy were investigated. It was found that the β-Ti phase in this alloy was stable under cold-rolling. With the increase in reduction ratio from 70% to 90%, the microstructure of the alloys evolved from deformed dendrite structure to fiber-like structure. The alloy cold-rolled with the reduction ratio of 70% exhibited optimum mechanical properties of combined high fracture strength of 1012 MPa and plastic strain of 10.1%, which are closely correlated with the dendrite structure of the alloy. It is indicated that the proper cold-rolling is an effective way to improve the mechanical properties of the titanium alloy.

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Effect of Input Parameter of Cold Isostatic Press (CIP) Towards Properties of Zirconia Block

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a3026.109119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 5908-5912

Keyword(s):

Mechanical Properties ◽

Wide Spectrum ◽

Input Parameter ◽

Strength Properties ◽

Cold Isostatic Pressing ◽

X Ray Diffraction ◽

Cold Isostatic Press ◽

Forming Process ◽

Soaking Time ◽

Four Levels

Zirconia have become widely studied as consequence of their outstanding mechanical properties, such as hardness, mechanical strength and fracture toughness, which allow them to cover a wide spectrum of applications as structural ceramics, including the field of biomaterials. This study was to compare the strength properties of zirconia block with and without Cold Isostatic Press (CIP). The mechanical properties of zirconia block with and without CIP were characterized. Samples of zirconia block will undergo forming process via Cold Isostatic Pressing (CIP), four levels of soaking time (no CIP, 60, 90 and 120 minutes). All of the sample with different soaking time then were sinter in the furnace. The parameter for sintering process was fixed 1300ºC at rate of 3ºC / min. All of the sample were tested for its strength properties using Vickers test. The density and shrinkage of the zirconia block was be analyzed. Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) were used to characterize samples if zirconia blocks.

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Effect of Reheating and Deformation Processes on DWTT Performance for Heavy Gauge Pipeline Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.921.149 ◽

2018 ◽

Vol 921 ◽

pp. 149-156

Author(s):

Chuan Guo Zhang ◽

Qi Jie Zhai ◽

Lei Zheng

Keyword(s):

Steel Plate ◽

Pipeline Steel ◽

Reduction Ratio ◽

Toughening Mechanism ◽

Soaking Time ◽

Single Pass ◽

Fracture Appearance Transition Temperature ◽

Fracture Appearance ◽

Deformation Processes ◽

Welded Pipe

DWTT (Drop weigh tear test) is an effective way to evaluate the fracture propagation for pipeline steel. The effects of slab reheating temperature, soaking time, single pass reduction ratio during recrystallization zone rolling and transfer bar ratio during non-recrystallization zone rolling on DWTT performance were studied for heavy gauge pipeline steel. And the grain refinement and toughening mechanism were discussed. It was found that the grain in the core of the plate can be refined by reducing the reheating temperature, increasing the single pass reduction ratio during recrystallization zone rolling and setting suitable transfer bar ratio during non-recrystallization zone rolling, which promote the DWTT property improvement for heavy gauge pipeline steel. The 30.9mm heavy gauge pipeline steel plate was industrial produced and the X70 UOE welded pipe with dimension in Φ1219×30.9mm was manufactured. The DWTT 85%FATT (fracture appearance transition temperature) of pipe body is as low as -20°C.

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Effect of Remelting Temperature and Soaking Time on Microstructure and Mechanical Properties of the Thixoformed Part of Nano-Sized SiCp/7075 Composite

Metals ◽

10.3390/met8090709 ◽

2018 ◽

Vol 8 (9) ◽

pp. 709

Author(s):

Jufu Jiang ◽

Guanfei Xiao ◽

Yingze Liu ◽

Ying Wang ◽

Xi Nie

Keyword(s):

Mechanical Properties ◽

Aluminum Matrix ◽

Side Wall ◽

Aluminum Matrix Composite ◽

Transgranular Fracture ◽

Composite Part ◽

Soaking Time ◽

Ultrasonic Assisted ◽

Bottom Side ◽

Side Walls

Semisolid billet of the 7075 aluminum matrix composite reinforced with nano-sized SiC particles was first fabricated by an ultrasonic-assisted semisolid stirring method and rheoforming technology. Then it was thixoformed into a cylinder part under different remelting temperatures and soak times. The effects of the remelting temperature and soaking time on the mechanical properties and microstructure of the thixoformed composite part were investigated. The results show that parts of good quality were thixoformed successfully. The microstructure of the top side wall of the thixoformed part consisted of near spheroidal grains. A large quantity of elongated grains occurred in the medium and bottom side walls and the bottom itself. With increasing remelting temperatures, the size of the solid grains of the thixoformed parts showed a trend of first to increase and afterwards to decrease. High density dislocations were found in the microstructure when the remelting temperatures were 590 °C and 600 °C. When the soaking time was 15 min, the severest deformation occurred in the thixoformed part. High mechanical properties of the thixoformed parts were achieved under conditions such as a remelting temperature between 590 °C and 600 °C and a soaking time between 10 min and 15 min. The fracture mode of the thixoformed part changed from transgranular fracture to intergranular fracture when the remelting temperature was elevated from 580 °C to 610 °C. After the thixoformed parts were treated by T6, the ultimate tensile strength (UTS) and elongation of the side wall were improved to 552 MPa and 7.9%, respectively. Dispersed MgZn2 precipitates created by T6 heat treatment led to an improvement of the mechanical properties.

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Characterization and correlation analysis of mechanical properties and electrical resistance of asphalt emulsion cold-mix asphalt

Construction and Building Materials ◽

10.1016/j.conbuildmat.2020.119974 ◽

2020 ◽

Vol 263 ◽

pp. 119974

Author(s):

Rui Li ◽

Zhen Leng ◽

Yongli Wang ◽

Fuliao Zou

Keyword(s):

Mechanical Properties ◽

Correlation Analysis ◽

Electrical Resistance ◽

Asphalt Emulsion

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The Research of Influence of Cold Rolling Conditions on Mechanical Properties Anisotropy of Sheets from Aluminum Alloy 8011A

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.685.385 ◽

2016 ◽

Vol 685 ◽

pp. 385-388

Author(s):

Yaroslav Erisov ◽

Fedor Grechnikov

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Cold Rolling ◽

Variance Reduction ◽

Reduction Ratio ◽

Sheet Plane ◽

Study Results ◽

Distribution Mode ◽

Anisotropy Of Mechanical Properties

The study results of the influence research of reduction ratio in cold rolling on the anisotropy of mechanical properties of sheets from aluminum alloy 8011A are shown in this article. It was determined that the effect of cold rolling on various mechanical properties is different. However, for all characteristics were usual to change the distribution mode and variance reduction in sheet plane during the high ratios of deformation. At the 85-90% reduction ratio it is observed the leveling of mechanical properties in sheet plane.

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