CAJ | 학술논문

研究了氧化物弥散强化(ODS)的3种铁素体钢，包括：19Cr-3.5Al ODS钢(MA956)，16Cr-0.1Ti ODS和16Cr-0.1Zr ODS铁素体钢，在多能量的氦离子和MeV能量级的Bi、Xe离子辐照条件下的硬化效应。获得了辐照硬化与原子离位损伤水平(dpa)、He注入浓度的关系。结果表明，材料的硬度在低剂量范围会随着辐照剂量迅速增加，而在高剂量范围材料的硬度逐渐趋于饱和，可以用1/2次的幂函数拟合辐照硬化与离位损伤水平之间的关系。不同入射离子——Bi离子和Xe离子都会引起ODS钢的硬化，而氦离子还会在材料中聚集导致氦泡的形成，造成更加明显的硬化。实验证明，Ti或Zr掺杂的16Cr-ODS铁素体钢较19Cr-3.5Al ODS钢具有更强的抗辐照硬化能力，原因可归于其含有更高数密度的细小氧化物粒子——能够有效俘获点缺陷和氦原子，从而有效抑制晶粒内部和晶界出缺陷的长大。
연구료양화물미산강화(ODS)적3충철소체강，포괄：19Cr-3.5Al ODS강(MA956)，16Cr-0.1Ti ODS화16Cr-0.1Zr ODS철소체강，재다능량적양리자화MeV능량급적Bi、Xe리자복조조건하적경화효응。획득료복조경화여원자리위손상수평(dpa)、He주입농도적관계。결과표명，재료적경도재저제량범위회수착복조제량신속증가，이재고제량범위재료적경도축점추우포화，가이용1/2차적멱함수의합복조경화여리위손상수평지간적관계。불동입사리자——Bi리자화Xe리자도회인기ODS강적경화，이양리자환회재재료중취집도치양포적형성，조성경가명현적경화。실험증명，Ti혹Zr참잡적16Cr-ODS철소체강교19Cr-3.5Al ODS강구유경강적항복조경화능력，원인가귀우기함유경고수밀도적세소양화물입자——능구유효부획점결함화양원자，종이유효억제정립내부화정계출결함적장대。
The present work investigates the irradiation hardening of ODS ferritic steels after multi-energy He-ion implantation, or energetic Bi-ion and Xe-ion irradiation, to get an understanding of dependence of irradiation-hardening on atomic displacement damage and gas accumulation. Three kinds of high-Cr ODS ferritic steels including the commercial MA956 (19Cr-3.5Al), the 16Cr-0.1Ti and the 16Cr-0.1Zr ODS ferritic steels were used. The results show that the hardness increases rapidly at the lower doses but tends to saturate at the higher dose. An 1/2-power law dependence on dpa value is obtained. Helium implantation contributes significantly to the irradiation hardening, possibly due to the impediment of the motion dislocations by helium bubbles. 16Cr-ODS (Ti or Zr added) ferritic which contains finer oxide particles in higher number density shows higher resistance to irradiation hardening than the MA056.