High-pressure torsion of thick Cu and A-Mg-Sc ring samples
High-pressure torsion of thick Cu and A-Mg-Sc ring samples
复制标题
厚铜环和 A-Mg-Sc 环样品的高压扭转
DOI：
10.1007/s10853-015-9033-x
复制
发表时间：
2015
影响因子：
4.5
通讯作者：
Zenji Horita
中科院分区：
文献类型：
--
作者：
Hideaki Iwaoka;Zenji Horita
对纯铜和Al-3%Mg-0.2%Sc合金进行了高压扭转试验，得到了初始厚度为4 mm的环形试样。使用光学显微镜和透射电子显微镜对整个厚度进行显微组织观察，以与硬度变化相关联。结果表明，无论是纯Cu还是Al合金，在横截面上，应变都是在厚度中心处引入的。该区域随着旋转次数的增加而膨胀，但是膨胀在覆盖整个横截面之前饱和。在纯铜中，随着应变发生软化，而在铝合金中，在不软化的情况下达到饱和。建议用变形严重区的厚度来估算外加应变。
Pure Cu and an Al–3 %Mg–0.2 %Sc alloy are processed by high-pressure torsion with ring-shape samples having an initial thickness of 4 mm. Microstructural observation across the thickness is carried out using optical microscopy and transmission electron microscopy to correlate with hardness variation. It is shown that the strain is introduced more intensely in the center of thickness on the cross sections for both pure Cu and the Al alloy. This area expands with an increasing number of revolutions but the expansion saturates before covering the entire cross section. Softening occurs with straining in pure Cu but saturation reaches without softening in the Al alloy. It is suggested that imposed strain is estimated using the thickness of severely deformed region.