与常规熔化焊相比，铝合金激光焊接加热集中、焊缝深宽比大、焊接结构变形小，但是也存在一些不足和缺陷，由于铝合金固有的物理性质，比如对激光低的吸收率、合金元素的低沸点、高的热导率、高的热膨胀系数、相对较宽的凝固温度区间、高的凝固收缩率、低粘度以及液态下高 ...

The aim of the Youth Activities Small Grants funding is to support children and young people, aged 12-25, by enabling them to apply for a small amount of funding to help them develop and to take part ...