نتایج جستجو برای: two pass hot deformation
تعداد نتایج: 2586292 فیلتر نتایج به سال:
Static recrystallization is a method of tailoring the microstructure and mechanical properties steels, which important for microalloyed forging steels as hot deformation process significantly affects their properties. In this paper, static behavior low-carbon Nb-V-microalloyed steel was investigated by double-pass compression tests at temperature 800–1100 °C interruption time 1–1000 s. The frac...
In the present work, hot tensile behavior of Haynes 25 Co-base alloy was investigated in the temperature range of 950-1200 ˚C and 0.1 s-1. Thermodynamic calculations showed that M23C6 and M6C carbides were stable below 1000 ˚C and above 1050 ˚C, respectively. Stress-strain curves also indicated an unusual trend of strain fracture. It was observed that with increasing temperature from 950 to 105...
The Nd-Fe-B hot-deformation magnet with high resistivity was successfully prepared by hot-pressing and of fast-quenched powder amorphous glass fiber. After the process optimization, increased from 0.383 mΩ·cm to 7.2 mΩ·cm. Therefore, eddy current loss magnets can be greatly reduced. microstructure shows that granular fiber forms a continuous isolation layer during hot deformation. At same time,...
Background and Aim: Hot flashes are the commonest complaint of postmenopausal women. Because of the side effects of hormone therapy, alternatives treatment methods, such as acupuncture, are used to control hot flashes. Therefore, the present study aimed to evaluate the effects of electro-acupuncture on hot flashes in postmenopausal women. Materials and Methods: In this randomized, placebo-cont...
A widely used method for hot forming steels and alloys, especially heavy forging, is the process of multistage forging with pauses between stages. The well-known effect which accompanies multistage hot forging is metal plasticity recovery in comparison with monotonic deformation. A method which takes into consideration the recovery of plasticity in pauses between hot deformations of a billet un...
Among the titanium alloys, Ti-6Al-4V is the most widely used. In the present work, the uniaxial hot compressive behavior of Ti-6Al-4V has been investigated under constant strain rates. A series of dilatometery experiments were carried out to determine the transformation temperatures at different cooling rates. Specimens were homogenized at 1050 °C for 10 minutes followed by fast cooling to dif...
Exotic-deformation effects in 46 Ti nucleus were investigated by analysing the high-energy γ-ray and the α-particle energy spectra. One of the experiments was performed using the charged-particle multi-detector array ICARE together with a large volume (4 " ×4 ") BGO detector. The study focused on simultaneous measurement of light charged particles and γ-rays in coincidence with the evaporation ...
The large deformation effects in the light-mass nuclei have been studied over last years, using both gamma and charged-particle spectroscopy. In particular the very elongated prolate or triaxial shapes were observed from the spectra of the Giant Dipole Resonance (GDR) decay for 46Ti* [1] and 45Sc* [2]. The results were consistent with the predictions of the LSD (LublinStrasbourg Drop) model [3,...
The effects of carbon content on the dynamic and static softening mechanisms of Ti microalloy steels were investigated both in ferrite and austenite regions. The results obtained showed that recrystallization rate decreased as the percentage of carbon content was increased from 0.0035 to 0.110. This is due to the Ti(CN) and TiC precipitates and also the free carbon content. In the ferrite reg...
Among the titanium alloys, Ti-6Al-4V is the most widely used. In the present work, the uniaxial hot compressive behavior of Ti-6Al-4V has been investigated under constant strain rates. A series of dilatometery experiments were carried out to determine the transformation temperatures at different cooling rates. Specimens were homogenized at 1050 °C for 10 minutes followed by fast cooling to dif...
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