A thin Cu coating was deposited on both sides of AZ31 magnesium alloy to be joined to study the material flow in friction stir welding.

在AZ31镁合金待焊表面镀一层很薄的铜层来研究塑性材料的流动情况。

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With the increase of the translation velocity of the pin, the flow of the material in friction stir welding becomes faster but the equivalent plastic strain decreases.

随着搅拌头平移速度的增加，垂直于焊缝方向上的截面上，等效塑性应变减小，但是材料的流动速度会随之增加。

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The results show that the wavelet denoising method can effectively restrain the noise in friction and sudden unbalance signal, and reserve the fault character information in the signals.

结果表明：小波分析降噪方法能够有效抑制碰磨和突加不平衡信号中的噪声并保留故障特征信息。

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But Ares will use new methods in metal-working science such as friction stir welding.

VOA: special.2009.12.30

And we have not had the kinds of friction that's been seen in the past.

VOA: standard.2009.12.12

Of course,the biggest difference between the two bills, and one likely to cause the most friction in House-Senate negotiations, involves the so-called "public option" or competing insurance the government would offer.

VOA: standard.2009.12.25

"We're finding that when you rub a natural biological surface that has an orientation - that has a grain, if you will - and you run that grain perpendicularly to the long axis of the ridges, we find a dramatic increase in friction, " Dr Dominy told BBC News.

BBC: Artificial finger tests evolutionary origin of prints

"Whereas personality similarity is likely to facilitate this process, personality differences may result in more friction and conflict in daily life, " she said.

BBC: NEWS | Health | Similarity 'makes happy marriage'

The global move toward state-run industries is running into a bit of friction in Germany.

FORBES: Protectionism Prevails Worldwide