Document Details
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Project |
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Document Title |
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Public housing projects and the future of high-rise buildings in the city of Jeddah, the physical and social characteristics and the optimal ways to operate and maintain. مشاريع الإسكان العام والعاجل ذات المباني عالية الارتفاع في مدينة جدة: خصائصها العمرانية والاجتماعية والسبل الأمثل لتشغيلها والمحافظة عليها. |
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Document Language |
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Arabic |
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Abstract |
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Steel used in this research is the steel low-carbon cast titanium, niobium and substitutional was manufactured in three different ways, the first rolling and has the Sumitomo Steel of Japan, and then take part of it, and subjected to rolling controlled beginning of 1225 m in the coefficient of the Institute for Science and Technology, University of Manchester, while the remaining part of rolled steel, without any other treatment has been subjected to in our labs at King Abdulaziz University for the cold-rolling such as hardening at 600 C for three periods, is 90 minutes, 24 hours, 48 hours, respectively.
Have been cut and Ttaghizz samples and shipped hydrogen Mahbttiya under the density electric current of 10 mA / cm 2, and then held her pulling a single axle low speed (2 mm / min), and tests were conducted tensile under conditions similar to the samples is charged is charged hydrogen. Comparing the results of tensile test of samples of charged and uncharged, The effect of heat treatment on the mechanical resistance of cast steel is used to disrupt hydrogen.
Conclude from the research that cracks caused by the disintegration of the hydrogen to make steel alloys as a result of complex reciprocal interactions of hydrogen, leading to the formation of the alloy deposits Alcirbeyd minute that act as traps for hydrogen molecules.
Resulted in hardening over a short time (90 minutes) at a temperature of 600 m, which Sheba shipping hydrogen for a short time (10 minutes), led to the tensile strength and tensile strength extreme p on the discrepancy (606 MPa 0.677 MPa, respectively), while the coated tensile strength was medium value (15%).
The hardening over a long time (48 hours) followed, shipment of hydrogen for a short time (10 minutes) has resulted in the values were low to compare the submission and ultimate tensile strength (331 MPa 0.387 MPa, respectively), and the high value of Mtalah tensile strength (25%). |
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Publishing Year |
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1420 AH
2000 AD |
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Added Date |
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Wednesday, April 30, 2008 |
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Researchers
| محمد علي الشهراني | alshahrani, mohammed ali | Investigator | Doctorate | |
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