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Register a new userStudying the Effects of Gas Heat Treatment on the Distribution of the Doping Elements on the Surface Layer of Titanium Alloys BT9
دراسة تأثير وسط المعالجة الحرارية الغازية على توزع عناصر الإشابة في الطبقة السطحية لسبائك التيتانيوم BT 9
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Tishreen University ورقة بحثية
Publication date
2018
fields
Physics
and research's language is
العربية
Authors
عفيف يونس برهوم( باحث )
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درسنا في هذا البحث تأثير وسط المعالجة الحرارية الغازية عند درجة الحرارة 950C باستخدام غاز NH3 و CH4 لمدة 8 ساعات لكل غاز ، و باستخدام غازيNH3 و CH4 لمدة 4 ساعات على توزع عناصر الإشابة في سبائك التيتانيوم BT9، حيث وجدنا أن الأكاسيد تتشكل في مختلف أوساط المعالجة نتيجة انتشار الأكسجين من الطور الغازي إلى أعماق كبيرة في العينات.
In this issue, the effect of gas heat treatment ambient at the temperature of 950C for 8hours using the gases NH3 or CH4 and using the gases NH3 and CH4 for (4+4)hours of the distribution of the doping elements on Titanium alloys BT9 was studied. Oxide formation at the different treatment ambient as a reason of gas-phase oxygen distribution to high depths in the samples was discovered.
References used
Danil Vershinin, Marina Smolyakova,, Influence of Phase-Structure Composition on Properties of Titanium Alloys at Low–Temperature Nitriding in Mixtures of Gases. National research university «Belgorod State University» Centre NSMN ct.,( 2011), pp.32-34
Andrea C. Sudik, Andrew R. Millward, Nathan W. Ockwig, Adrien P. Côté, Jaheon Kim, and Omar M. Yaghi .,Design, Synthesis, Structure, and Gas (N2, Ar, CO2, CH4, and H2) Sorption Properties of Porous Metal-Organic Tetrahedral and Heterocuboidal Polyhedra , Soongsil University, Seoul , Korea ,(2005), pp.157-743
Emeline A. V. , Sheremetyeva N. V. , Khomchenko N. V. , Ryabchuk V. K. Photoinduced Formation of Defects and Nitrogen Stabilization of Color Centers in N-Doped Titanium Dioxide, Institute of Physics, St. Petersburg State University, and Dipartimento di Chimica Organica, Universita , Italia, (2007), 111 (30), pp 11456–11462
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We have studied in this paper the effect of thermal gaseous using NH3 – gas at some
diffusion layers properties of tool steel 20 in temperature range (550 ,650 ,750, 850) 0C ,
4h at each one . The purpose of this heat treatment is to get and determ
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fatigue and corrosion resistance.
The micro-hardness was determined using Vickers's tester with values ranged
between ( 130-435 ) HV.
In order to verify these results, we studied the microstructure if the surface layers
using metallurgical microscope and SEM (Scanning Electron Microscope). Furthermore
the corrosion resistance was studied after immersing it in sea water for two year.
In this work, the processing of aluminum alloys - copper, which
added amounts of copper to aluminum in different parentages (2.5-
4-4.5%) so as not to exceed the limit of saturation Aluminum 6 %(
copper).
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val (0 – 8)h where the nitrogen diffusion constant is at 850 0C and 8h.
Under the supposed condition this study has illustrated that the diffusion depth of nitrogen atoms from surface towards inners reaches to ̴ 1.2mm, i.e., determining the layer thickness of the formed nitride compounds which gives the surface layer of α – Fe high resistance against corrosion processes resulting from surrounded environment.
This research aims to study the effect of adding alloying elements and heat treatment
of Zinc metal on solar energy absorbing , nine alloys ingots were manufactured by
changing the percentages of added Aluminum and Copper on the pure Zinc, and thes
e
ratios of Aluminum were : (10% , 20% , 30% , 40 % , 50%) to demonstrate the effect of
adding Aluminum to Zinc metal on solar energy absorbing , and ratios of copper were :
(20% , 40%) , as well as we prepare two pure zinc samples with 99.2% of purity , one
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In order to measure the solar energy absorbing for prepared samples , we
manufactured a device depends on the methods of heat exchange between solar radiation
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The obtained results showed that adding Aluminum and Copper to the pure Zinc
caused a decrease in solar energy absorbing .
As well as increasing the percentages of adding Aluminum and Copper to the pure
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comparing the absorbing of pure zinc samples, one was rapidly cooled and the other
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A new group of Z n - Al alloys suitable for casting was developed in the late sixties, These alloys are
ZA - 8 , ZA - 12 and ZA – 27, where the numbers represent the approximate percentage of aluminum in the alloy. These alloys compete with cast iro
n and copper alloys and aluminum alloys. ZA – 27 alloy is characterized by the biggest strength and lowest density alloy from the rest of ZA alloys. It has
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The microstructure of the alloy after casting and after heat treatment was examined and the effect of
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The hardness and tensile strength of heat treated samples were reduced while elongation was increased
compared with alloy after casting. The rate of decrease of hardness was equal to 34.7 %, which is
consistent with solutionizing period. On the contrary, the increase in the solutionizing period decreases strength and increases elongation. The study shows also that the heat treated samples have achieved a significant improvement on wear properties compared to the samples after casting without heat treatment
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