基面織構(gòu)組分不斷降低，而包含<11 3>方向的錐面織構(gòu)組分呈現(xiàn)出先增加后減小的趨勢，導(dǎo)致合金的延伸率和杯突值先增加后減小。當(dāng)鈣含量為0.5%時，合金表現(xiàn)出最強(qiáng)的橫向分裂織構(gòu)特征，綜合力學(xué)性能最優(yōu)，最大強(qiáng)度為238MPa、最大延伸率為22%、杯突值為4.31mm。"/>

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鈣元素含量對Mg-2Al-xCa-0.2Gd鎂合金織構(gòu)演變和性能的影響
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北京科技大學(xué)冶金工程研究院,北京科技大學(xué)冶金工程研究院,北京科技大學(xué)冶金工程研究院,北京科技大學(xué)冶金工程研究院,北京科技大學(xué)冶金工程研究院

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中圖分類號:

TG 164.2

基金項目:

中央高?；緲I(yè)務(wù)費(fèi)（FRF-IC-15-002）


The Influence of Calcium (Ca) Content on the Texture Evolution and Mechanical Properties of Mg-2Al-xCa-0.2Gd Magnesium Alloys
Author:
Affiliation:

Engineering Research Institute,University of Science and Technology Beijing,Engineering Research Institute,University of Science and Technology Beijing,Engineering Research Institute,University of Science and Technology Beijing,Engineering Research Institute,University of Science and Technology Beijing,

Fund Project:

National Natural Science Foundation of China (51202175)

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    摘要:

    在鎂合金中加入適量鈣元素，具有細(xì)化晶粒、提高強(qiáng)度和耐熱性能等優(yōu)點(diǎn)。本文通過OM、SEM、EBSD、XRD等分析手段，研究了不同鈣含量對Mg-2Al-xCa-0.2Gd (x=0.2, 0.5, 1.0, 2.0; mass%)合金晶粒尺寸、織構(gòu)和力學(xué)性能的影響。研究結(jié)果表明：隨著鈣含量的不斷增多，合金晶粒尺寸不斷減小，強(qiáng)度不斷增加。但織構(gòu)具有不同的演化規(guī)律，{0001}<11 0>基面織構(gòu)組分不斷降低，而包含<11 3>方向的錐面織構(gòu)組分呈現(xiàn)出先增加后減小的趨勢，導(dǎo)致合金的延伸率和杯突值先增加后減小。當(dāng)鈣含量為0.5%時，合金表現(xiàn)出最強(qiáng)的橫向分裂織構(gòu)特征，綜合力學(xué)性能最優(yōu)，最大強(qiáng)度為238MPa、最大延伸率為22%、杯突值為4.31mm。

    Abstract:

    The addition of proper amount of calcium to magnesium alloys can refine grain size, enhance strength and heat-resistant. The influence of different contents of calcium (Ca) on the grain size, texture and mechanical properties of Mg-2Al-xCa-0.2Gd (x=0.2, 0.5, 1.0, 2.0; mass%) were investigated in this paper through the OM, SEM，EBSD and XRD techniques. The results showed that with the increase of the Ca content the grain size gradually decreased which leads to the improvement of strength. However, the texture evolution had different characterization such as the decrease of {0001}<11 0> texture, the firstly increase and then decrease of the pyramidal texture components containing the <11 3> direction, which resulted in the corresponding change of elongation and Erichsen value. The magnesium alloy with 0.5% calcium content exhibited bimodal texture characterization and showed the best mechanical properties with the maximal tensile strength of 238MPa, the total elongation of 22% and the Erichsen value of 4.31mm.

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江海濤,劉鵬,康強(qiáng),董鵬,張韻.鈣元素含量對Mg-2Al-xCa-0.2Gd鎂合金織構(gòu)演變和性能的影響[J].稀有金屬材料與工程,2017,46(12):3897~3902.[Jiang Haitao, Liu Peng, Kang Qiang, Dong Peng, Zhangyun. The Influence of Calcium (Ca) Content on the Texture Evolution and Mechanical Properties of Mg-2Al-xCa-0.2Gd Magnesium Alloys[J]. Rare Metal Materials and Engineering,2017,46(12):3897~3902.]
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  • 收稿日期:2015-10-28
  • 最后修改日期:2016-01-31
  • 錄用日期:2016-02-24
  • 在線發(fā)布日期: 2018-01-04
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