Influence of La-Ce Mischmetal on Dendritical Arm Space and Ultimate Tensile Strength in ZL105 Alloys
来源期刊：JOURNAL OF RARE EARTHS2000年第1期
论文作者：LI Ge-sheng LI Hua-ji LIU Chang-ming
Key words：rare earths; Al-Si alloy; dendritical arm space; ultimate tensile strength;
Abstract: The influence of pure La, pure Ce, (La+Ce) mischmetal on the dendritical arm space(LDAS) of ZL105 alloy in cylinderical casting was studied. The effects of adding amount of (La+Ce) mischmetal on LDAS and ultimate tensile strength(σb) were investigated, and the relationship between σb and LDAS was founded. (La+Ce) mischmetal has stronger ability to refine LDAS than pure La or pure Ce. The proper adding amounts of it is 0.15%(mass fraction). LDAS has a remarkable effect on σb of casting, which can be predicted by the regression equation obtained in this work.
LI Ge-sheng1，LI Hua-ji1，LIU Chang-ming1
(1.Department of Mechanical Engineering, Chongqing University, Chongqing 400044, China)
Abstract:The influence of pure La, pure Ce, (La+Ce) mischmetal on the dendritical arm space(LDAS) of ZL105 alloy in cylinderical casting was studied. The effects of adding amount of (La+Ce) mischmetal on LDAS and ultimate tensile strength(σb) were investigated, and the relationship between σb and LDAS was founded. (La+Ce) mischmetal has stronger ability to refine LDAS than pure La or pure Ce. The proper adding amounts of it is 0.15%(mass fraction). LDAS has a remarkable effect on σb of casting, which can be predicted by the regression equation obtained in this work.
Key words:rare earths; Al-Si alloy; dendritical arm space; ultimate tensile strength;
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