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Trans. Nonferrous Met. Soc. China 28(2018) 1329-1333 Significant influence of sharp grain boundary corner on tensile elongation of copper bars with columnar grains and its mechanism Zhang-zhi SHI1... and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing 100083, China Received 9 March 2017; accepted 18 September 2017 Abstract: The reason why elongation of copper......
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宝钢某连续退火机组平整机控制技术李东江1,2,陈启军1,王国民1(1.上海市同济大学电子与信息工程学院2.上海市宝山钢铁股份有限公司)摘 要:宝山钢铁股份有限公司某连续退火机组采用双机架平整工艺,以延伸率控制为核心,通过调节张力或轧制力来实现延伸率的稳定.延伸率采用闭环控制,为提高实际延伸率的计算精度,在高速和低速两种不同的情况下,采用不同的方法进行计算.张力调节器的输出乘以一个比例系数,作为上游设备速度给定的张力前馈补偿,以减小动态过程中带钢张力的波动.轧制力控制采用轧制力外环,位置内环的双闭环结构,提高了系......
Sn对Mg-6Al合金力学性能的影响李萍1(1.河南省洛阳市洛阳理工学院 土木工程系)摘 要:采用拉伸试验,断口分析和组织观察,研究150℃和175℃下不同Sn含量Mg-6Al合金的抗拉强度和延伸率,得出Mg-6Al合金的力学性能随Sn含量的变化关系.结果表明,随着Sn含量的增加,Mg-6Al合金的抗拉强度和延伸率均先增加后降低,且均在Sn含量为1%时取得最大值.加入适量的Sn可改善Mg-6Al合金的显微组织,从而提高其力学性能.关键词:金属材料； Mg-6Al合金； Sn； 抗拉强度； 延伸率......
. The results of tensile tests showed that the Mg-4Li-3(Al-Si) alloy exhibited the highest ultimate tensile strength (UTS) of 249 MPa but the lowest elongation of 6.3%. The Mg-12Li-3(Al-Si) alloy had the highest elongation of 26% but the lowest UTS of 173 MPa. The different mechanical properties were attributed to the different crystal structures of the three alloys and the precipitate with different......
, and its elongation increases from 5.5% to 13.8%.The increase of the strength is related to the rising of the kinds of the phase which is coherent or semi-coherent to the matrix, the size of the particles, distribution heterogeneous and the percentage of the second phase volume. The increase of the elongation is related to the improvement of the alloy plasticity by precipitate free zone caused......
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bending test without brittle fracture at room-temperature, the elongation ratio of spheroidized as-cast specimen is 15.7% while the tensile strength σb is 259.5MPa. The ingot is hot-forged at 850℃ to sheet... gradually during the bruising process.
Key words: Ni-graphite alloy; plastic deformation; fiber-like microstructure; elongation ratio
that the tensile strength and elongation of the SSSC-fabricated rod were improved by 22% and 17%, respectively, compared with those of the LSC-fabricated rod. For SSSC, the average particle size (APS) and the shape factor (SF) increased with the increase of re-melting temperature (Tr), whereas the tensile strength and elongation increased first and then decreased. The APS increased with increasing the mold......半固态挤压铸造铝ZL104合金连杆的显微组织及力学性能
来源： 《中国有色金属学报(英文版)2018年第2期》——王永飞 赵升吨 张晨阳
