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with grain size in the range 40-100 ?m at pre-heating temperature lower than 400 ℃. In the present study, however, there are no difficulties in rolling as-deposited AZ91 alloy at 350 ℃. It can be hot-rolled... strength(YS) of AZ91 alloy produced by spray forming with those of die casting and ingot extrusion. The improvement in the room temperature mechanical behavior in the present investigation is remarkable......
to analyze an asymmetric stepped shaft. To evaluate the MCWR process and better understand its deformation characteristics, the material flowing mechanisms, temperature distributions, strain and rolling... was analyzed, and the stress and temperature change of the work piece were studied during the CWR process. ZHOU et al [18] studied internal voids in the MCWR rolling stepped shaft. In his study......
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INFLUENCE OF COLD ROLLING TECHNOLOGY ON TEXTURE EVOLUTION OF IF STEEL X.H.Liu1,J.X.Li1,G.D.Wang1 (1.State Key Laboratory of Rolling & Automation, Northeastern University, Shenyang 110006, China) Abstract:Two kinds of cold rolling experiments, single cold rolling and double cold rolling, werecarried out on one titanium stabilized interstitial free (IF) steel that has been warmrolled at ferrite......
MICROSTRUCTURE EVALUATION OF SEMI-SOLID STEELMATERIALS IN ROLLING PROCESS AND THERESULTING MECHANICAL PROPERTIES W.M.Mao1,R.B.Song1,A.M.Zhao1,J.L.Sun1,Y.L.Kang1 (1.School of Materials Science... out. Experimental results show that the segregation of liquid occurs when the semi-solid slurry is rolled, which influences the microstructure and mechanics performance of workpiece under room......
=336.3 K, and the martensitic transformation temperature was above the room temperature. The microstructures of samples before and after rolling were observed by Polyvar-Met metallographic microscope... temperature is 850 ℃, and the strain rate is 1 s-1. The rolling processes with more passes and weak deformation (Project 1) and with few passes and strong deformation (Project 2) were used, respectively......
. A sample cut from the ingot was rolled non-isothermally from 400°C to 100°C in 100°C steps,with 15% reduction in thickness; it was then cold rolled isothermally at room temperature for 85% reduction... alloy consists of α-aluminum and various intermetallic compounds. These compounds are segregated along the grain boundaries,which makes the alloy difficult to roll at room temperature. The combined......
of Technology,Harbin 150001,China摘 要:The influence of volume fraction on damping capacities at room temperature for amorphous carbon fiber reinforced aluminum matrix composites was investigated.At room temperature,the dislocation damping is the primary damping mechanism.Meanwhile,the dislocation damping exhibits dynamic hysteresis at low strain amplitudes......
of extruded material is different from that of as-cast ingot, the latter is mainly a brittle fracture. Ductile fracture plays a role in hot-extruded AZ91 failure at room temperature.关键词:...Microstructure and tensile behavior of hot extruded AZ91 alloys at room temperatureYuanyuan Li, Datong Zhang, Ying Liu, Yan Long, and Weiping ChenCollege of Mechanical Engineering, South China......
