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poulton’s reagent as the etchant. The TEM specimens were produced parallel to XZ plane. To do so, 1 mm thick slices were cut using a low-speed saw. Then, they were mechanically polished to a thickness... in this image. The SAED pattern contains clear points. This pattern illustrates that most of the fine grains created during the first pass of the operation involved low-angle boundaries. Similar situation......
equation depends upon the stress value. It is reported that the power law equation "breaks down" at high stress values, therefore, it is valid for low stress values, i.e., ασ<0.8 (Eq. (2)). On the other..., SEETHARAMAN V. Modeling dynamic recrystallization using cellular automata [J]. Scripta Materialia, 1998, 38: 405-413. [11] KOCKS U F. Laws for work-hardening and low-temperature creep [J]. Journal......
of Astronautics Systems Engineering, Beijing 100076, China Received 3 November 2015; accepted 3 March 2016 Abstract: Three kinds of welds were made using low frequency pulse current variable polarity... treatable aluminum alloy has outstanding mechanical properties at low temperature and the most readily weldability among 2000 series aluminum alloys [1]. Because of these characteristics, 2219 aluminum......
(19.0 kJ/mol), △G0 (-28.8 kJ/mol) and △S0 (0.148 kJ/mol) were also determined. According to the experimental results, it is concluded that CMC could be used as an alternative low cost potential... that the adsorption capacity of CMC is low (average of about 269 mg/g) for the pH at 2.0. The adsorption capacity increases linearly up to a maximum value of about 319 mg/g as the pH of the solution......
optimization using RSM has been characterized by an indefinite saddle function in the form of quadratic response surface model. Thus, the grey relational grade was an effective choice for quality index in grey... grade, which was selected as the prototypical of responses in the disclosed methodology of GRSM. This integrated performance measure has been examined by using RSM, generating the scope......
for expressing brand of solder 表1 常用金基低温钎料 Table 1 Commonly used Au-based low temperature solders 图2 金基低温钎料合金的显微组织[21] Fig. 2 Microstructures of Au-based low temperature solder...-Ag-Cu系,Pd-Ag系和Pd-Au系为典型的多级钎焊用钎料[43],如表4所列,它们均有良好的钎焊工艺性能,耐蚀性和塑性,但硬度和强度不高,不适于用作高强度钎焊接头的钎料,通过时效处理可提高其硬度. 表4 常用分级钎焊用钯基钎料 Table 4 Commonly used Pd-based solders for grade brazing 2.2 高温耐热......
papers from a coarse grade of 1200 to fine grade of 3500. The electrode was then successively rinsed with ethanol and isopropanol and finally dipped in the electrolytic cell. The experiments were...). The high frequency limit (f >10 kHz) represents the solution resistance (Rs). The low frequency limit (f < 2 Hz) corresponds to the sum of Rs and the charge transfer resistance (Rct), which......
and photochemical properties, ability to grow high quality single crystal at low cost. Also, it is an inexpensive luminescent and bio-friendly oxide semiconductor material. As a result, ZnO... or microwave-assisted synthesis, direct precipitation and homogeneous precipitation method. For instance, WAN et al [3] have reported the synthesis of randomly oriented ZnCdO nanowires with a low Cd atomic......
angle, and a large crack formed. Both sides of the rock wall constantly sink under self-weight, so a graben crack is formed with a low middle portion and two higher, steep sides (Fig. 14). Fig. 13... and optimization of metal mine mining design and ground pressure control [M]. Beijing:Science Press, 2000. (in Chinese) [5] HATHEWAY A W. Subsidence at san manuel copper mine, pinal country, Arizona [J......
when being used for making bio-based carbon foam, presents tailor made and versatile properties but is low in density and not very high in strength [22]. Olive stones also resulted into carbon foam... gases (CO2, CO, CH4, H2, H2O, and CxHy) were escaped and a liquid tar was collected in a beaker. Due to the presence of aldehydes and low molecular-mass acids, the tar oil had a strong smoky odor......
