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huang811000银虫 (正式写手)
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[求助]
求修改一段英语-金属类
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用一个简单的示意图用来描述这种新现象，示意图1对应原图中的局部区域a。示意图上显示的是β 分布在η 的枝针间，并且有长大的趋势。在没有变质的合金中，η枝针间分布是共晶组织。有资料表明：在合金成分偏离共晶点成分的亚共晶中合金中，在铸造条件下，将会发生离异共晶转变，他的共晶转变是在已存在的大量先共晶相的条件下进行的。那么，共晶组织中的η相会依附在先共晶的η相上生长，剩下的另一β相则单独存在晶界处，从而使枝针间的共晶组织的特征消失。又因为变质剂的加入，为β相生长提供了多质点，所以晶界处多为分布均匀的β相。 Fig. 2d show the α’-Al phase appear in grain boundary and with the trend of growing up. A simple diagram can be used to illustrated this new phenomenon, and fig.3 depicts parts of the area A and B in the original diagram. In Fig. 3a, Which details primary η phase surrounded by α’-Al phase. However, the unrefined alloy revealed a dendritic structure (η-Zn phase) surrounded by eutectic structure. Some of reviews [] demonstrate that in the hypoeutectic forming by that the ingredient of the alloy deviates the ingredient of eutectic point, a phenomenon of divorced eutectic would appear under the casting conditions. That is to say the η phase come from eutectic structure adhere the first eutectic η phase and grow up. The rest of the another α’-Al phase in grain boundary is exist alone, so that feature of eutectic structure between η phase disappear. In addition, with the addition of master alloy to the alloy, the promotion of Al3Zr to the formation of α’-Al phase, so α’-Al phase distributes uniformity in grain boundaries. In fig. 3b, lamellar eutectic grain structure and columnar eutectic grain structures still were observed which its far from η phase. Because it cann’t be supply the nucleant particles for η phase come from eutectic structure, then still present eutectic structure characteristic. |
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huang811000
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3楼2011-09-17 11:18:58
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xfzhang7
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【答案】应助回帖
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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
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
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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。 |
5楼2011-09-19 16:23:30
