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In the present work, the effect of Nd on the microcracks generated on an Al–17.5Si alloy surface by a high current pulsed electron beam (HCPEB) was investigated. By a newly proposed site-fixed observation, the propagation of microcracks with increasing pulsed numbers first increases and then decreases due to the Nd element. The crack density decreases from 0.0669mm/mm2 of 5 pulses to 0.00687mm/mm2...
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