Experimental Study on the Impact Properties of Concrete Bridge Pier Reinforced with Stainless Steel Rebar

2018 ◽  
Vol 46 (4) ◽  
pp. 20160468 ◽  
Author(s):  
Guoxue Zhang ◽  
Ziqing Chen ◽  
Juan Lu ◽  
Shixiang Xu ◽  
Xiwu Zhou
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Bridge Pier ◽  
Concrete Bridge ◽  
Impact Properties ◽  
Steel Rebar ◽  
The Impact

scholarly journals Study on Concrete Pier Impact Performance after Implementing Equal Cross-Section Stainless Steel with Protection from Closed-Cell Aluminum Foam

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Xiwu Zhou ◽  
Honglong Zhang ◽  
Wenchao Zhang ◽  
Guoxue Zhang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Aluminum Foam ◽  
Bridge Piers ◽  
Concrete Bridge ◽  
Reinforced Concrete Bridge ◽  
Impact Forces ◽  
Closed Cell ◽  
Steel Bars ◽  
The Impact

In the present study, in order to examine the impact performances of ordinary reinforced concrete bridge piers which have been replaced by stainless-steel bars of equal cross-sections under the protective condition of anticollision material, the impact dynamic responses of the ordinary reinforced concrete bridge piers, with replacements under the protection of closed-cell aluminum foam, were compared and analyzed using an ultrahigh drop hammer impact test system. The results showed that when the impact velocity was small (for example, less than 1.42 M/s), after the implementation of equal cross-sectional replacements, the closed-cell aluminum foam had been in an elastic or yield stage. During that stage, the impact forces of the stainless-steel reinforced concrete piers were larger than those of the ordinary reinforced concrete piers, and the relative ratios were stable at approximately 28 to 34%. In addition, the relative ratios of the displacements at the tops of the components were also found to be stable at approximately 22%, and the change rates of the concrete ultrasonic damages were approximately the same. However, when the impact forces had increased (for example, more than 1.67 m/s), the closed-cell aluminum foam entered a densification stage, and the peak impact force ratios decreased sharply. It was also observed that the relative peak displacement ratios at the tops of the components displayed increasing trends, and the change rates of the concrete ultrasonic damages had displayed major flux. Therefore, the replacement of the ordinary piers with stainless-steel bars had increased the possibility of shear failures.

Splat Solidification of Tin Droplets

1996 ◽  
Author(s):  
R. Bhola ◽  
S. Chandra
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Simple Model ◽  
Surface Temperature ◽  
Steel Surface ◽  
Liquid Droplet ◽  
Contact Angles ◽  
Stainless Steel Surface ◽  
Splat Solidification ◽  
The Impact

Abstract An experimental study was done of the impact and solidification of tin droplets falling on a stainless steel surface. The surface temperature was varied from 25°C to 240°C. Measurements were made of droplet diameters and contact angles during droplet spread. At a surface temperature of 240°C there was no solidification, and a simple model of liquid droplet impact successfully predicted the extent of droplet spread. Droplets impacting on surfaces at 25°C and 150°C solidified before spreading was complete.

Effects of Interrupted Quenching Procedures on Properties of Type 410 Stainless Steel

1961 ◽  
Vol 83 (4) ◽  
pp. 551-556
Author(s):  
J. Bressanelli ◽  
J. Hoke
Keyword(s):  
Stainless Steel ◽  
Impact Strength ◽  
Cooling Rate ◽  
Martensite Transformation ◽  
Marked Improvement ◽  
Heat Treating ◽  
Air Cooling ◽  
Impact Properties ◽  
Subsequent Tempering ◽  
The Impact

The impact strength of hardened Type 410 stainless steel is known to be adversely affected when the steel is tempered between 750 and 1050 F. However, a desirable combination of other properties may be obtained by tempering within this range. An investigation was performed to determine the extent of improvement in impact strength that may result from certain variations in heat-treating procedures. The hardening operation was studied thoroughly, and a large number of commercial heats was included in the program to establish the consistency of results. It was found that the cooling rate through the martensite transformation range has a significant effect upon the impact properties after subsequent tempering. Rapid cooling such as that which occurs during oil quenching is detrimental, but air cooling of 0.4-in-diameter bar samples was sufficiently slow to bring about a marked improvement. This improvement was present for samples tempered at all temperatures through 1000 F with the greatest degree of improvement occurring for samples tempered in the range of 700 to 900 F. No improvement was observed for samples tempered at 1100 F and above. Martempering procedures are particularly suited for taking advantage of this phenomenon.

scholarly journals A Comparative Test Study of the Impact Performances of Stainless-Steel Rebar Equal-Strength Replacement Piers

2019 ◽  
Vol 20 (1) ◽  
pp. 67-79
Author(s):  
Xiwu Zhou ◽  
Wenchao Zhang ◽  
Yushen Gao ◽  
Guoxue Zhang ◽  
Ruisheng Xiong
Keyword(s):  
Stainless Steel ◽  
Comparative Test ◽  
Steel Rebar ◽  
Equal Strength ◽  
Test Study ◽  
The Impact

scholarly journals Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 625 ◽  
Author(s):  
Le Thanh Hung Nguyen ◽  
Jae-Sik Hwang ◽  
Myung-Sung Kim ◽  
Jeong-Hyeon Kim ◽  
Seul-Kee Kim ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Low Temperatures ◽  
316L Stainless Steel ◽  
Charpy Impact ◽  
Cryogenic Temperatures ◽  
Absorbed Energy ◽  
Impact Properties ◽  
Charging Time ◽  
The Impact

316L stainless steel is a promising material candidate for a hydrogen containment system. However, when in contact with hydrogen, the material could be degraded by hydrogen embrittlement (HE). Moreover, the mechanism and the effect of HE on 316L stainless steel have not been clearly studied. This study investigated the effect of hydrogen exposure on the impact toughness of 316L stainless steel to understand the relation between hydrogen charging time and fracture toughness at ambient and cryogenic temperatures. In this study, 316L stainless steel specimens were exposed to hydrogen in different durations. Charpy V-notch (CVN) impact tests were conducted at ambient and low temperatures to study the effect of HE on the impact properties and fracture toughness of 316L stainless steel under the tested temperatures. Hydrogen analysis and scanning electron microscopy (SEM) were conducted to find the effect of charging time on the hydrogen concentration and surface morphology, respectively. The result indicated that exposure to hydrogen decreased the absorbed energy and ductility of 316L stainless steel at all tested temperatures but not much difference was found among the pre-charging times. Another academic insight is that low temperatures diminished the absorbed energy by lowering the ductility of 316L stainless steel.

Experimental study of a reinforced concrete bridge pier strengthened with HPFRC jacketing

2020 ◽  
Vol 210 ◽  
pp. 110355 ◽  
Author(s):  
Adriano Reggia ◽  
Alessandro Morbi ◽  
Giovanni A. Plizzari
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Bridge Pier ◽  
Concrete Bridge ◽  
Reinforced Concrete Bridge

Effects of prestrain on high temperature impact properties of 304L stainless steel

2010 ◽  
Vol 25 (4) ◽  
pp. 754-763 ◽  
Author(s):  
Woei-Shyan Lee ◽  
Chi-Feng Lin ◽  
Tao-Hsing Chen ◽  
Meng-Chieh Yang
Keyword(s):  
Stainless Steel ◽  
Flow Stress ◽  
Strain Rate ◽  
Work Hardening ◽  
Rate Sensitivity ◽  
304L Stainless Steel ◽  
Impact Properties ◽  
Work Hardening Rate ◽  
The Impact ◽  
Sensitivity Increase

The effects of prestrain, strain rate, and temperature on the impact properties of 304L stainless steel are investigated using a compressive split-Hopkinson pressure bar. The impact tests are performed at strain rates ranging from 2000 to 6000 s−1 and temperatures of 300, 500, and 800 °C using 304L specimens with prestrains of 0.15 or 0.5. The results show that the flow stress, work-hardening rate, and strain rate sensitivity increase with increasing strain rate or decreasing temperature. As the prestrain increases, the flow stress and strain rate sensitivity increase, but the work-hardening rate decreases. The temperature sensitivity increases with an increasing strain rate, temperature, and prestrain. Overall, the effects of prestrain on the impact properties of the tested specimens dominate those of the strain rate or temperature, respectively. Finally, optical microscopy observations reveal that the specimens fracture primarily as the result of the formation of adiabatic shear bands.

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