Nature of an endothermic peak of As-quenched Al-11.8 mol%Li alloys
Nature of an endothermic peak of As-quenched Al-11.8 mol%Li alloys
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性质%20of%20an%20吸热%20peak%20of%20淬火%20Al-11.8%20mol%Li%20合金
DOI：
10.2320/matertrans1989.39.62
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Y. Amemiya
中科院分区：
文献类型：
--
作者：
H. Okuda;I. Tanaka;Taro Matoba;K. Osamura;Y. Amemiya
在日本KEK光子工厂15A光束线上进行了同步辐射小角/100散射（SR-SAS/100）原位同步辐射实验。通过SAS和100谱分析，研究了Al- 11.8 mol%Li淬火试样在加热过程中的组织变化。差示扫描量热（DSC）实验发现，400 K左右的吸热反应与淬火过程中形成的有序区无序相对应。从成分波动特征长度的变化和加热过程中有序特征长度的变化两方面讨论了淬火过程中形成的微观组织。
In-situ and simultaneous synchrotron-radiation small-angle/100 scattering (SR-SAS/100) experiments have been performed at beam-line 15A of Photon Factory, KEK Japan. The structural change during heating as-quenched Al- 11.8 mol%Li samples has been examined by analyzing SAS and 100 profiles. It was found that the endothermic reactions observed in differential scanning calorimetry (DSC) experiments around 400 K correspond to the disordering of ordered regions formed during quench. The microstructure formed during the quench has been discussed in terms of the change of the characteristic lengths for compositional fluctuation and that for ordering during heating.