Dissolution of Al2Cu phase in non-modified and Sr modified 319 type alloys
Dissolution of Al2Cu phase in non-modified and Sr modified 319 type alloys
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DOI：
10.1179/136404608x347662
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发表时间：
2008-10-01
影响因子：
1.4
通讯作者：
Doty, H. W.
中科院分区：
文献类型：
--
作者：
Han, Y. M.;Samuel, A. M.;Doty, H. W.
研究了固溶热处理对未改性和150 ppm Sr改性319型合金中Al 2Cu相溶解的影响。为此目的，使用含有不同Mg水平（0、0.3和0.6重量%）的实验和工业319合金。结合能量色散X射线（EDX）分析的电子探针显微分析（EPMA）被用来监测Cu在基体中的分布，并测量未溶解的Al 2Cu相。在铸态319合金中，铜在枝晶边界处偏析。Mg和Sr的添加可能导致这种偏析恶化。热处理后，铜开始更均匀地分布在整个枝晶以及在基体中。溶解在基体中的Cu的量随着固溶时间和温度的增加而增加，在490 ° C/8h固溶热处理时达到最大值。研究了共晶和块状Al 2Cu的溶解过程。
This study investigates the effects of solution heat treatment on dissolution of the Al2Cu phase in non-modified and 150 ppm Sr modified 319 type alloys. Experimental and industrial 319 alloys containing different Mg levels (0, 0.3 and 0.6 wt-%) were used for this purpose. Electron probe microanalysis (EPMA) in conjunction with energy dispersive X-ray (EDX) analysis was used to monitor the distribution of Cu in the matrix and to measure the undissolved Al2Cu phase. In as cast 319 alloys, copper segregates at the dendrite boundaries. The addition of Mg and Sr may cause this segregation to deteriorate. After heat treatment, the copper begins to distribute more evenly across the dendrite as well as in the matrix. The amount of Cu dissolved in the matrix increases with increasing solution time and temperatures, reaching a maximum for the 490 degrees C/8 h solution heat treatment. The dissolution process of eutectic and block like Al2Cu was also investigated.