Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys
-
摘要: 采用原位反應噴射沉積法制備TiCP/7075(TiCP體積分數為2·91%)鋁合金,觀察其微觀組織.應用I mage Tool軟件及平均截線法統計平均晶粒尺寸,并與噴射沉積7075鋁合金進行對比.發現前者的晶粒尺寸比后者減小50%左右,表明原位TiC顆粒對噴射沉積7075鋁合金組織具有顯著的細化作用.從形核的屬性、速度以及過程的晶體學分析對其細化機理進行了解釋.Abstract: The microstructure of an in-situ reactive spray formed TiCp/7075 (TiCp = 2.91% in volume fraction) Al alloy was observed using SEM. The grain sizes were measured by Image Tool software and a mean linear intercept method and compared with that of spray formed 7075 Al alloys. The result showed that the grain size of the former alloy was decreased 50 % compared to the later. It is indicated that in-situ TiC particles play a significant role on refining the microstructure of spray formed 7075 Al alloys. The refinement mechanism was interpreted from nucleation attribute, nucleation velocity and crystallographic analysis in nucleation process.
-
Key words:
- 7075 Al alloy /
- in-situ TiC particles /
- spray forming /
- microstructure
-
點擊查看大圖
計量
- 文章訪問數: 138
- HTML全文瀏覽量: 28
- PDF下載量: 7
- 被引次數: 0
下載:
