对激光涂层进行了多次冲击碰撞试验，并通过SEM等手段分析研究了激光涂层在多冲碰撞载荷下的裂纹形成与扩展机理。
The flaws' forming and expanding mechanism had been analyzed and studied, that was happened on the laser coating under repeated impact load by SEM or some other methods.
对激光涂层进行了多次冲击碰撞试验，并通过SEM等手段分析研究了激光涂层在多冲碰撞载荷下的裂纹形成与扩展机理。
The flaws' forming and expanding mechanism had been analyzed and studied, that was happened on the laser coating under repeated impact load by SEM or some other methods.
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