|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Directional solidification and physical properties measurements of the zinc-aluminum eutectic alloy显示文摘Zn-5wt% Al eutectic alloy was directionally solidified with different growth rates (5.32-250.0μm/s) at a constant temperature gradient of 8.50 K/mm using a Bridgman-type growth apparatus.The values of eutectic spacing were measured from transverse sections of the samples.The dependences of the eutectic spacing and undercooling on growth rate are determined as λ=9.21V-0.53 and ΔT=0.0245V0.53,respectively.The results obtained in this work were compared with the Jackson-Hunt eutectic theory and the similar experimental results in the literature.Microhardness of directionally solidified samples was also measured by using a microhardness test device.The dependency of the microhardness on growth rate is found as Hv=115.64V0.13.Afterwards,the electrical resistivity (r) of the casting alloy changes from 40×10-9 to 108×10-9 Ω·m with the temperature rising in the range of 300-630 K.The enthalpy of fusion (ΔH) and specific heat (Cp) for the Zn-Al eutectic alloy are calculated to be 113.37 J/g and 0.309 J/(g·K),respectively by means of differential scanning calorimetry (DSC) from heating trace during the transformation from liquid to solid. | S.Engin U.Byük H.Kaya N.Maraslι | 2011 | International Journal of Minerals,Metallurgy and Materials2011，18，6： | 3 |
| 2 | 通用螺旋立铣刀的力学和动力学模型(一)显示文摘在工业上使用各种形状的螺旋立铣刀。在航空和宇航、汽车和模具工业上,广泛使用螺旋圆柱、螺旋球头、圆锥螺旋球头、大圆角和专用立铣刀。每种铣刀的形状可能不同,但在每个刀刃切割点切削过程的力学和动力学是共同的。本文介绍工业上使用的大多数螺旋立铣刀的广义数学模型。立铣刀形状用绕参数包络包缠的螺旋槽建模。沿参数螺旋槽的刀刃点的坐标用数学表出。应用包含刀具和工件两者振动结构的纯铣削运动学,估计出每一切削点处的切屑厚度。沿和工件接触的每一切削刃进行积分,对任意立铣可预测出切削力、振动、尺寸表面粗糙度和颤振稳定性图。预测出的切削力、表面粗糙度和稳定性图,对于球头、螺旋锥球头和大圆角立铣,可证实本文提出的广义立铣分析方法的可行性。。 | S.Engin Y.Altintas 吴喜让 宗荣珍 | 2003 | 国外金属加工2003，24，2： | 1 |
| 3 | 通用螺旋立铣刀的力学和动力学模型(二)显示文摘4模拟和试验结果
使用本文提出的广义方法,用各种刀具几何参数和材料,进行了超过300个切削试验.这里介绍螺旋和镶齿立铣实例,用以证明所提出模型的柔性. | S.Engin Y.Ahintas 吴喜让 宗荣珍 | 2003 | 国外金属加工2003，24，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员