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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
8814402(金币+1): 感谢应助 2011-09-19 19:21:05
sltmac(金币+2): 欢迎常来~ 2011-09-20 13:50:41
sltmac(金币+20): 2011-09-23 08:47:26
sltmac(金币+20): 2011-09-23 08:47:30
sltmac(金币+20, 翻译EPI+1): 2011-09-23 08:47:36
sltmac: 感谢应助，欢迎常来 2011-09-23 08:47:41
Fig. 2d shows that the α’-Al phase is growing in the grain boundary. A simple diagram can be used to explain this new phenomenon, as shown in fig.3. The primary η phase is surrounded by an α’-Al phase. However, the unrefined alloy has a dendritic structure (η-Zn phase) surrounded by an eutectic structure. Early studies [] have demonstrated that in the hypoeutectic alloy departed from the eutectic point, a divorced eutectic transformation will occur under the casting conditions. It indicates that new η phase will grow on the the original existing eutectic η phase. The second phase α’-Al phase will stay in grain boundary. As a result, the eutectic structure of the η phase no longer exists. In addition, by adding a master alloy, the Al3Zr promotes the formation of the α’-Al phase, which distributes the uniformity of the grain boundaries. In fig. 3b, a lamellar eutectic grain structure and a columnar eutectic grain structure are also observed which are far from the η phase. There is no nuclei for the η phase transformation from the eutectic structure, whereby it still shows the eutectic structure characteristic.
只可参考。
1。时态要保持一致。
2。“because”不能用做句首
3。写完以后读一下，很多地方不通顺，而且“a”和“the”要习惯用在句子中。
4。中文到英文最好不要直译，毕竟语言习惯不同。 |
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