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| 铸造镁合金热裂行为的研究进展 |
| Research Progress on Hot Tearing Behavior of Cast Magnesium Alloys |
| Received:July 16, 2020 Revised:September 10, 2020 |
| DOI：10.3969/j.issn.1674-6457.2020.05.001 |
| 中文关键词: 镁合金 热裂 热裂理论 评估方法 影响因素 |
| 英文关键词: magnesium alloy hot tearing hot tearing theory evaluation method influencing factors |
| 基金项目:国家自然科学基金（51825101）；国家重点研发计划（2016YFB0301002）；青海省重大科技专项（2018-GX-A1）；上海市科委重点项目（18511109302） |
| Author Name | Affiliation | | HU Bo | School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China | | LI De-jiang | School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China | | LI Zi-xin | School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China | | ZENG Xiao-qin | School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China | | DING Wen-jiang | School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| 中文摘要: |
| 热裂是铸造镁合金成形过程中常见的缺陷，该缺陷的产生极大限制了高性能镁合金的工业应用。了解热裂形成机理、掌握热裂评估方法和影响因素对科学选材和批量应用具有重要的理论和实践价值。总结了现有的热裂理论、试验评估方法、热裂影响因素以及大部分镁合金热裂行为的评估结果，期望能为研究同行提供参考。强度理论、液膜理论、晶间搭桥理论、凝固收缩-补偿理论、裂纹形成功理论和冲击应力理论指导了热裂评估设备的设计，并为研究合金成分、凝固条件和微观组织等因素对热裂行为的影响提供了理论基础。现有的热裂数据并非采用同一评估方法获得，很难进行横向比较。未来热裂研究应尽量统一评估所采用的设备方法，以便建立镁合金相关的数据库，进而为大数据科学选材提供可能。 |
| 英文摘要: |
| Hot tearing is a common defect in cast magnesium alloys. Its occurrence greatly limits the industrial production of high performance magnesium alloy. Understanding the formation mechanism, evaluation method and influencing factors of hot tearing is of great theoretical and practical value for scientifically selecting materials and mass production. This review summarized the existing hot tearing theory, test evaluation methods, hot tearing influencing factors and the evaluation results of most magnesium alloys, hoping to provide reference for peer researchers. Strength theory, liquid film theory, intergranular bridging theory, solidification shrinkage-feeding theory, crack-formation energy theory and impact stress theory guided the design of hot tearing evaluated equipment, and laid a theoretical foundation for studying the effects of alloy composition, solidification condition and microstructure on hot tearing behavior. The existing hot tearing data is not obtained by the same evaluation method, and it is difficult to make a horizontal comparison. In the future, research on hot tearing should try to unify the equipment and method of evaluation in order to establish a database relevant to magnesium alloy and then provide the possibility for scientific selection of big data. |
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