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, 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......
Deformation Behavior of Zr65Cu17.5Ni10Al7.5in Superplastic Forming with Silicon Mould: Simulation and Application杨璠,SHI Tielin,YU Qiang,廖广兰State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology摘 要:We investigated the deformation behaviors of Zr65Cu17.5Ni10Al7.5 in superplastic forming......
by (-196 ℃, 12 h)+(200 ℃, 12 h) for 4 times. There was some decrease in ultimate strength but some increment in elongation when treated by (-196 ℃, 12 h)+(250 ℃, 12 h). However, the ultimate strength abruptly decreases to 307 MPa and the elongation increases to 5.6% when the samples are treated by (-196 ℃, 12 h)+(300 ℃, 12 h), and the mechanical properties are stable at this level as the number......
Experimental Investigation on Individual Effect of Deformation Variables on Mechanical Behavior of Superplastic Alloy Zn-AlWang Zhenfan, Chen Jiamin and Ma Longxiang摘 要:superplastic materials have already been done, but these variables are non-separated on each other even are regarded as unable to be thoroughly separated in measurement so far. Based on experiments......
超塑性非球面自由胀形的测量宋玉泉1,马品奎1,管志平1(1.吉林省长春市吉林大学超塑性与塑性研究所)摘 要:超塑性胀形是成形薄壁壳形件的重要技术,已经在航空技术领域占有重要地位.由于超塑性自由胀形是建立超塑胀形力学解析理论的重要依据,又是超塑胀形成形的必经阶段,而超塑自由胀形的轮廓曲面为轴对称旋转曲面,本文针对精确测量轴对称旋转曲面的几何参数尚存在的一些问题,提出了测量方法及基本原理,介绍了基于单目成像的图像采集系统及摄像机参数的标定方法,并对旋转体试件的成像测量进行分析,给出了误差补偿公式;对于实验中极点高度......
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