摘要
本文研究了多晶α－Ｆｅ经９０ｋｅＶ，６×１０（１６）ｉｏｎｓ／ｃｍ２银离子注入前后的低周疲劳性能，结果表明，离子注入改善了α－Ｆｅ的低周疲劳性能，疲劳韧性系数和疲劳韧性指数的绝对值分别从未注入时的０．０７６和０．３２增加到０．２１６和０．４２。作者认为，注入离子阻碍了体心立方基体螺位错的交滑移是疲劳韧性提高和低周疲劳性能改善的主要机制；另外，注入引起的缺陷强化和固溶强化对提高低周疲劳性能也有一定作用。
The low cycle fatigue properties of polycrystalline α-Fe before and after the implantation of Ag￣+ ions by 90 keV and 6×10￣(16) ions/cm2 arestudied in this paper. Results thew that adn implantation improves the low cycle fatigue properties of α-Fe. The fatigue toughness factor and fatigue tongness index are increased from 0. 076 and 0. 32 before iniplantation to 0. 216and 0.42 respectively after implantation. Authors consider that, the major mechanism of improving the low cycle fatigue properties and increasing the fatigue toughnese is the hindrance by ion implantation to the cross-slips of helix. dislocation of body-centered cubic base. In addition, the strengthening of defects and the strengthening of solid solution aroused by implantatinn also affect the enhancement of low cycle fatigue properties to some extent.
出处
《上海有色金属》
CAS
1995年第1期19-22,共4页
Shanghai Nonferrous Metals
