Parası kalmadığı için otobüse binemiyordur ailesi porno izle ona daha yeni para gönderdiği için tekrar porno istemeye utanınca mecburen otostop çekmek için youporn çantasını alarak yol kenarına gelir etekli porno liseli türk kız yol kenarında dururken yanına yaklaşan porno kibar bir gencin onu gideceği yere kadar bırakmak porno izle istemesine çok mutlu olur arabaya bindiklerinde gideceği yer ile porno arabayı kullanan adamın gittiği yer arasında çok mesafe sex izle farkı olduğunu anlayan türk kız bu yaptığı porno indir iyilik karşısında arabada ona memelerini açar porno sapıklaşan adam yol kenarındaki hotelde durarak porno izle üniversiteli otostop çeken türk kızına odada sakso çektirip sikerObservation of Acoustic Impedance of Solid and Reflected Angles to Porous Ti-Mn Alloys Via Analysis Description by Scanning Acoustic Modes| Abstract

44 7460 854 031

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Abstract

Observation of Acoustic Impedance of Solid and Reflected Angles to Porous Ti-Mn Alloys Via Analysis Description by Scanning Acoustic Modes

Author(s): Yahya Al-Sayad, Abdellaziz Doghmane and Zahia Hadjoub

Ti-Mn alloy with crystal structure having a Poisson’s ratio of 0.33 and density around (4730) gcm-3, Ti-Mn alloy was prepared by mechanical alloying for many applications. In the present study, effect of porous Ti and TixMn (with x=5) alloy with different porosities (21%, 40.53% and 56%) were applied. It was found that as the porous TixMn alloys increases from (21% to 56%) with increasing Acoustic parameter values of propagating of solid Acoustic impedance (ZL, ZT, Z Solid) and longitudinal, transverse and Rayleigh reflected angles (ƟL, ƟT, ƟR) are as follows : ZL (3311-4029) MrayI, ZT (1668-2030) MrayI, ZSolid (35-51.83) MrayI and ƟL (13.16 19.19 dag., ƟT (34.3-50.8)dag., ƟR (38.77-41.63) dag respectively, using some acceptable physical approximations were used. ZT impedance and ZL impedance dependence on porosities of material studied, behavior cases showed due to different propagating wave modes in the surface, features at some critical angles at which longitudinal, shear and Rayleigh modes are generated. Such change influence Acoustic impedance on porous Ti-Mn alloys Acoustic signature.


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