The Corrosion and Oxidation Resistance Improvement of DZ4 Ni-Based Superalloy Irradiated by High Intensity Pulsed Ion Beams
The Corrosion and Oxidation Resistance Improvement of DZ4 Ni-Based Superalloy Irradiated by High Intensity Pulsed Ion Beams
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DOI：
10.4028/www.scientific.net/amr.538-541.276
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
X. Mei;Jian Fu;Xiao Fei Liu;Jun Xu;Youkang Wang
中科院分区：
文献类型：
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作者：
X. Mei;Jian Fu;Xiao Fei Liu;Jun Xu;Youkang Wang
采用强流脉冲C离子和H离子束辐照DZ 4镍基高温合金。离子束参数为：加速电压250 kV，脉冲宽度70 ns，离子流密度160 A/cm ~ 2。辐照脉冲为2、5、10和15。利用扫描电镜（SEM）观察了辐照前后DZ 4的形貌。利用X射线衍射仪（XRD）分析了复合材料的相结构和应力状态。结果表明，辐照后样品表面出现了凹坑，随着辐照时间的延长，凹坑边界变得模糊甚至消失。初始辐照产生的表面拉应力在多次辐照后可以得到缓解。辐照后DZ 4合金的耐腐蚀性能得到明显提高。在1000°C气氛下辐照DZ 4表面形成连续致密的α-Al 2 O3层，提高了其抗高温氧化性能。
In this paper, the DZ4 Ni-based superalloy was irradiated by high intensity pulsed C ion and H ion beam. The parameters of ion beam were: accelerating voltage 250 kV, pulse duration 70 ns, ion current density 160 A/cm2. Irradiation pulses were 2, 5, 10 and 15. The morphology of DZ4 before and after irradiation was observed by scanning electron microscope (SEM). The phase structure and stress state were analyzed by X-ray diffraction (XRD). The results show that there were some craters on the surface of the sample after irradiation, as the irradiation time increased, the crater boundary became blurred and even disappeared. The surface tensile stress produced by initial irradiation could be relieved after several irradiations pulses. The corrosion resistance of irradiated DZ4 alloy was improved greatly. The continuous and dense α-Al2O3 layer that formed on irradiated DZ4 surface at 1000°C atmosphere increased the high temperature oxidation resistance.