英语翻译
In the present study,high-chromium ferritic stainless steel,type 447,was aged at 520°C under both static and cyclic loading conditions and microstructure was analyzed using a transmission electron microscope (TEM).其中的be aged at 怎么翻译,以及under 后面是什么成分
求专业啊 不要再来些2的混分的了。