Research On The Surface Morphology And Performance Of Light Alloy Irradiated By High Intensity Pulse Beam

Ions and energy distribution of magnesium alloy AZ31, commercial pure titaniumTA1and titanium alloy TC4irradiated by HIPIB were simulated by SRIM to providetheoretical basis for the research of morphology and property. The ions were constituteby70%C+and30%H+. Ions energy was250keV. It is noted that the ranges of C+inAZ31, TA1and TC4were0.712μm,0.3968μm and0.3994μm respectively and therange of H+in AZ31, TA1and TC4were3.24μm,1.57μm and1.58μm respectively.Irradiating ions produce a mass of defects, for example vacancies, in targets. It is crucialfor the crater formation on the targets surface.ABAQUS simulate the regularity of surface temperature variation of titaniumalloy TC4irradiated by HIPIB. Results indicate that the temperature of near-surfacelayers is the highest. The high temperature could lead to ablation and eruption ofnear-surface. It lead to the appear of crater.HIPIB irradiation into casting and rolling magnesium alloy AZ31, commercialpure titanium TA1and titanium alloy TC4has been carry out by TIA-450HIPIBapparatus. SOLO HCPEB apparatus was used to irradiate commercially pure aluminum1060and wrought aluminium alloy2A12.The ions were constitute by70%C+and30%H+. HIPIB energy was250keV. Current density is170-200A/cm2. Pulse width is80ns.HCPEB accelerating voltage is12kV. Electric current is140A. Impulse frequency is1HZ. Metallographic microscope, scanning electron microscope (SEM), X-raydiffraction(XRD) and microhardness tester have been used to investigate themetallographic structure, surface morphology, phase structure and microhardness.Following results appear after HCPEB irradiation.(1) Craters appear on the targets surface due to selective ablation and the recoilmomentum of ablation plasmas. Severe ablation in the phase boundary of2A12are taken place. The ablation lead to retiform band on2A12surface.(2) There is no new phase appear after HCPEB irradiation. There is no stressexist inside of the two targets surface.(3) Microhardness of the two targets surface is increased because of thefine-grain strengthening.Following results appear after HCPEB irradiation.(1) Craters appear on the targets surface due to selective ablation and the recoilmomentum of ablation plasmas. Severe ablation in the phase boundary of2A12aretaken place. The ablation lead to retiform band on2A12surface.(2) There is no new phase appear after HCPEB irradiation. There is no stressexist inside of the two targets surface.(3) Microhardness of the two targets surface is increased because of thefine-grain strengthening.