| pH值对触变成形和金属型铸造AZ91D镁合金试样应力腐蚀行为的影响 |
| |
| 引用本文： | 李海宏,陈体军,郝远,侯伟骜,吕维玲. pH值对触变成形和金属型铸造AZ91D镁合金试样应力腐蚀行为的影响[J]. 铸造, 2006, 55(8): 835-838 |
| |
| 作者姓名： | 李海宏 陈体军 郝远 侯伟骜 吕维玲 |
| |
| 作者单位： | 兰州理工大学材料科学与工程学院,省部共建有色金属新材料国家重点实验室培育基地,甘肃,兰州,730050 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划);中-以合作项目 |
| |
| 摘 要： | 采用静载荷实验和扫描电镜,研究了pH值对触变成形和金属型AZ91D镁合金应力腐蚀行为的影响。通过对试验现象、试样断裂时间及断口形貌的对比分析,结果表明:触变成形AZ91D镁合金的抗应力腐蚀敏感性明显高于金属型AZ91D镁合金的。主要是由于触变成形工艺的优良性,使得镁合金的组织在二次加热等温处理的过程中具有了球状的组织结构,而并非像金属型那样的树枝晶状的组织。同时这种成形工艺也降低了铸件的缩松、气孔和氧化夹杂等缺陷。
|
| 关 键 词： | AZ91D镁合金 触变成形 应力腐蚀 断口形貌 杂质 |
| 文章编号： | 1001-4977(2006)08-0835-04 |
| 收稿时间： | 2005-12-22 |
| 修稿时间： | 2006-03-06 |
Influence of pH on Stress Corrosion Behavior of Thixoformed and Metal Mould AZ91D Magnesium Alloy |
| |
| LI Hai-hong,CHEN Ti-jun,HAO Yuan,HOU Wei-ao,L Wei-ling. Influence of pH on Stress Corrosion Behavior of Thixoformed and Metal Mould AZ91D Magnesium Alloy[J]. Foundry, 2006, 55(8): 835-838 |
| |
| Authors: | LI Hai-hong CHEN Ti-jun HAO Yuan HOU Wei-ao L Wei-ling |
| |
| Affiliation: | Institute of Materials Science and Engineering, Lanzhou University of Technology, State Key Laboratory of New Nonferrous Metal Materials, Lanzhou 730050, Gansu, China |
| |
| Abstract: | Influence of pH on stress corrosion behavior of thixoformed and metal mould AZ91D magnesium alloy was investigated by means of constant load test and SEM. By analysis of experiment phenomenon, fracture time and fracture morphology. The results indicated that low SCC susceptibility of test sample of thixoformed is obviously higher than that of metal mould. Mainly because thixoformed craft was excellent. Make the organization of the magnesium alloy has spherical particle in the course of reheating and isothermal treatment, it is not the initial dendrite organization. Meanwhile,this kind of craft reduced defect of cavity and oxide inclusion of test sample. |
| |
| Keywords: | AZ91D magnesium alloy thixoformed stress corrosion fracture morphology impurity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
