[1]薛山,孙扬善,丁绍松,等.Ca 和Sr 对AE42 合金蠕变性能的影响[J].东南大学学报(自然科学版),2005,35(2):261-265.[doi:10.3969/j.issn.1001-0505.2005.02.022]
 Xue Shan,Sun Yangshan,Ding Shaosong,et al.Effects of Ca and Sr additions on creep resistance of AE42 magnesium alloy[J].Journal of Southeast University (Natural Science Edition),2005,35(2):261-265.[doi:10.3969/j.issn.1001-0505.2005.02.022]
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Ca 和Sr 对AE42 合金蠕变性能的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第2期
页码:
261-265
栏目:
材料科学与工程
出版日期:
2005-03-20

文章信息/Info

Title:
Effects of Ca and Sr additions on creep resistance of AE42 magnesium alloy
作者:
薛山 孙扬善 丁绍松 白琴 陶立 薛烽
东南大学材料科学与工程系, 南京 210096
Author(s):
Xue Shan Sun Yangshan Ding Shaosong Bai Qin Tao Li Xue Feng
Department of Matierials Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
AE42 Ca Sr 蠕变
Keywords:
AE42 Ca Sr creep
分类号:
TB31
DOI:
10.3969/j.issn.1001-0505.2005.02.022
摘要:
研究了碱土元素Ca和Sr对AE42耐热镁合金蠕变性能的影响.试验结果表明,铸态AE42合金中的显微组织由α-Mg基体、针状的Al11La3相和少量粒状的Al2La组成.在175 ℃, 70 MPa的蠕变条件下,针状的Al11La3相分解成为Al2La和Mg17Al12,导致AE42合金蠕变性能的急剧下降.在AE42中加入Ca和Sr后,针状的Al11La3逐渐被Al2Ca相和Al4Sr金属间化合物以及少量Al2La取代,分布在晶界的Al2Ca相和Al4Sr相具有很高的热稳定性,使合金的蠕变性能得到了极大的提高.
Abstract:
The effects of alkaline elements Ca and Sr additions on creep resistance of heat resistant magnesium alloy AE42 have been studied. The results show that the as-cast microstructure of AE42 is composed of α-Mg matrix, acicular Al11La3 phase and small amount of particulate Al2La phase. The poor creep resistance of AE42 at 175 ℃ and 70 MPa is due to the acicular Al11La3 phase decomposes to Al2La and Mg17Al12. The acicular Al11La3 phases is gradually replaced by Al2Ca and Al4Sr intermetallic compound and small amount of Al2La with Ca and Sr addition into AE42. The Al2Ca and Al4Sr intermetallic phases distributing at grain boundaries have very high thermal stability, thus resulting in significant improvement of creep resistance.

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相似文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家高技术研究发展计划(863计划)资助项目(2001AA331030-01).
作者简介: 薛山(1970—),男,博士; 孙扬善(联系人),男,教授,博士生导师, yssun@seu.edu.cn.
更新日期/Last Update: 2005-03-20