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zoe122208木虫 (正式写手)
superboy
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[求助]
求助英文翻译
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| 这种间歇性出现特殊波峰的原因是：在磁场力的作用下，铝管加速运动，在铝管端部材料变形过程中由于间隙较小，速度达不到临界值，因此钢管升温不高，内外管的相对运动不足以满足产生剪切的条件。而当距离逐渐增加，铝管运动速度逐渐增加，达到临界碰撞速度后，高速撞击使得钢材料迅速升温软化，铝管的运动便会很容易“卷起”一部分钢，形成特殊的波峰。波峰不会超过过渡区范围的原因是当过渡区形成初期，温度较高，其强度和硬度均低于母材，被“卷起”的钢材可以较为容易的在过渡区内运动，但当钢材达到一定高度后遇到较硬的铝材，此时铝材沿着焊接方向移动，带动波峰也向着焊接方向移动，形成倾斜状。由于材料在高应变速率下的屈服强度极高，因此随着距离继续增加，要克服材料的变形抗力做功越来越大，速度逐渐降低，与变形初期情况类似，只能出现常规的波纹状波形。 |
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befair
铁杆木虫 (正式写手)
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zoe122208: 金币+50, 翻译EPI+1, ★★★★★最佳答案 2013-12-27 23:18:02
zoe122208: 金币+50, 翻译EPI+1, ★★★★★最佳答案 2013-12-27 23:18:02
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The reason for this kind of intermittent and particular wave peaks is: under the force of magnetic fields, the aluminum pipe accelerates. During deformation of material at the end of the aluminum pipe and due to the small gap, speed does not reach the critical value. Hence the steel pipe temperature does not rise much and the relative movement of the inner and outer pipe is not sufficient for shear conditions. While the distance increases, the aluminum pipe speed gradually increases and when it reaches the critical collision value, the high speed collision makes the steel material temperature rapidly increase and hence softens. The movement of the aluminum pipe will easily "wrap up" some steel, hence forming special wave peaks. The reason why these wave peaks do not exceed the transitional area range is that at the onset of forming the transitional area, the temperature is high and its strength and hardness are both lower than the mother material and the "wrapped up" steel can easily move inside the transitional area. When the steel material reaches a certain height to meet the harder aluminum, the aluminum will move along the welding direction and carry the wave peaks also move in the same direction, causing a tilting formation. Since the materiel has very high yield strength under high stain rate, as the distance continues to increase, the work needed to overcome the material's resistance to deformation continues to increase. The speed decreases and similar to the onset period, only regular corrugated wave forms occur. 匆匆，希望有帮助 |
2楼2013-12-26 20:57:10