Výsledky vyhledávání

Effect of Cadmium Plating Thickness on the Charpy Impact Energy of Hydrogen-Charged 4340 Steel

Autor: E. Jones, A. Dominguez, M. Papakyriakou, Sergiy Kalnaus, J. Alrashid, J. Guerra, M. Miller, Brentt Ramsey, E. W. Lee, Y. Li, Hasim Mulazimoglu, J. Alcisto, William E. Frazier, N. Ula, Liang Zeng, M. Hahn, Omar S. Es-Said

Publikováno v: Journal of Materials Engineering and Performance. 25:3606-3614

Hydrogen was intentionally introduced into ultra-high strength steel by cadmium plating. The purpose was to examine the effect of cadmium plate thickness and hence hydrogen on the impact energy of the steel. The AISI 4340 steel was austenitized at 10

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b099284b6326c510e86f6f121997ce1c
https://doi.org/10.1007/s11665-016-2246-6

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Evaluation of the Microstructure and Charpy Impact Toughness of Hot Worked Powder Ti-6Al-4V

Autor: A. Dominguez, Khaled Almahmoud, Hamid Garmestani, N. Ula, F. Orantes, J. Foyos, Amjad Ali, Omar S. Es-Said, Y. Li, Ali Tabei, O. Almahmoud

Publikováno v: Defect and Diffusion Forum. 367:183-191

Ti-6Al-4V powder, produced by the hydride-dehydride (HDH) process, was hot isostatically pressed (HIP) into three bars. The 10 cm (4 in) diameter bars were hot worked (HW) to three different diameters: 5.1 cm (2 in) (75% reduction in area), 3.8 cm (1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a8a501d4d529ea7b76ed7608a348189a
https://doi.org/10.4028/www.scientific.net/ddf.367.183

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The Effect of Processing Method on Microstructure and Mechanical Behavior of Ti-6Al-4V Plate Produced by Powder Metallurgy Technique

Autor: Khaled Almahmoud, Omar S. Es-Said, L. Sutanto, T. Shimabukuro, M. Nordman, Hamid Garmestani, O. Almahmoud, N. Ula, R. Daouk, A. Abad, J. Skupnjak, M. Burrell, J. Foyos

Publikováno v: Defect and Diffusion Forum. 367:175-182

Three Ti-6Al-4V plate materials produced by powder metallurgy technique, included pre-alloyed hydride-dehydride (HDH) plate rolled to 75% reduction in thickness, and two blended elemental (BE) powder plates rolled to 75% and 87% reduction were evalua

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4de11e7d591041eccfc16fd101530b00
https://doi.org/10.4028/www.scientific.net/ddf.367.175

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Effect of Heat Treatments on the Mechanical Properties of Ti-3Al-2.5V Alloy

Autor: R Marloth, E. Devore, M. Dearborn, Liang Zeng, J. Guerra, N. Ula, J. Foyos, T. Chavez, E. Tong, Y. Li, Hamid Garmestani, Omar S. Es-Said, Hasim Mulazimoglu, Brentt Ramsey, M. Miller

Publikováno v: Journal of Materials Engineering and Performance. 24:3277-3290

Titanium alloy Ti-3Al-2.5V is cheaper to produce and has the potential of improved ductility and formability compared to the Ti-6Al-4V alloy. Various heat treatments were performed on cylindrical tensile test bars in order to optimize the mechanical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::926ee04bfe7c3f5a8871a68791b7ffa0
https://doi.org/10.1007/s11665-015-1628-5

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Characterization of the Effects of Active Filler-Metal Alloys in Joining Ceramic-to-Ceramic and Ceramic-to-Metal Materials

Autor: E. Montz, A. Abad, N. Ula, L.W. Walker, Y.S. Oh, Fadhil A. Hashim, Hamid Garmestani, A.O. Al-Roubaiy, Omar S. Es-Said, S. Pastor, Akrum Abdul-Latif, D. Aliya

Publikováno v: Defect and Diffusion Forum. 354:167-173

This study investigated actively brazing Alumina-to-Alumina with Ag-Cu-Ti as the filler metal system and Alumina-to-Copper with Cu-Ti-Co as the filler-metal system. The research was conducted on four samples, two of which were alumina brazed to alumi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c49e59aee1fa508a4b677ec631531fcd
https://doi.org/10.4028/www.scientific.net/ddf.354.167

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The Effect of Layer Orientation on the Mechanical Properties and Microstructure of a Polymer

Autor: N. Ula, Boris C. Fritz, T. Lam, Omar S. Es-Said, James Clements, A. Abad, V. Vega

Publikováno v: Journal of Materials Engineering and Performance. 20:978-988

Rapid Prototyping (RP) is a method used everywhere from the entertainment industry to healthcare. Layer orientation is an important aspect of the final product. The objective of this research was to evaluate the effect of layer orientation on the mec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd7db07942c36ecf2f4c2e960d4c00a6
https://doi.org/10.1007/s11665-010-9740-z

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A novel feed-forward compensation technique for single-stage fully-differential CMOS folded cascode rail-to-rail amplifier

Autor: N. Ula, S. M. Rezaul Hasan

Publikováno v: Electrical Engineering. 88:509-517

This paper presents a novel active and passive mixed feed-forward compensation technique for single-stage CMOS folded-cascode rail-to-rail operational trans-conductance amplifiers (OTA). Simulations using 0.5 μm Agilent CMOS process parameters indic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26b59935daf6377c91a99c862fa14cf1
https://doi.org/10.1007/s00202-005-0306-2

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A novel 10GHz CMOS inductive buffered transimpedance amplifier stage for optical transceivers

Autor: N. Ula, S. M. Rezaul Hasan

Publikováno v: 2008 51st Midwest Symposium on Circuits and Systems.

This paper presents a novel CMOS current feed-back inductive buffered transimpedance amplifier (IB-TIA) stage using the IBM 130 nm 8M2P CMOS process technology. Using the novel inductive buffer technique a 10 GHz bandwidth was achieved with a transim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f39b0804418b22864caab8fad6b01291
https://doi.org/10.1109/mwscas.2008.4616878

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Analog CMOS charge model for molecular redox electron-transfer reactions and bio-chemical pathways

Autor: N. Ula, S.M.R. Hasan

Publikováno v: ISCAS

Oxidation and reduction (Redox) reactions are known to constitute an electron transfer chain in many biochemical pathways in living organisms (systems). Mathematical modeling of these bio-chemical pathways is of growing focus in the emerging area of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43087c723e0ff8265beaaafa9fbb3383
https://doi.org/10.1109/iscas.2008.4541848

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A Novel Current Feed-back Sub-Nano-Siemen Transconductance Circuit Suitable for Large Time-Constant Bio-medical Applications

Autor: N. Ula, S. M. Rezaul Hasan

Publikováno v: APCCAS

A novel (1/R - 1/gm - gm) circuit using current feedback technique capable of delivering subnanosiemen and lower transconductance values is proposed. Compared to most other nanotransconductors which usually operate in weak inversion this circuit oper

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ec8228c8226058de612539c36e4050d
https://doi.org/10.1109/apccas.2006.342100

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