Quick Search:       Advanced Search
黄志权,韦建春,黄庆学,马立峰,高翔宇,岳照涵.轧前深冷处理对AZ31镁合金显微组织和力学性能的影响[J].稀有金属材料与工程(英文),2018,47(10):2942~2948.[Huang Zhiquan,Wei Jianchun,Huang Qingxue,Ma Lifeng,Gao Xiangyu and Yue Zhaohan.Effect of cryogenic treatment prior rolling on microstructure and mechanical properties of AZ31 magnesium alloy[J].Rare Metal Materials and Engineering,2018,47(10):2942~2948.]
Effect of cryogenic treatment prior rolling on microstructure and mechanical properties of AZ31 magnesium alloy
Download Pdf  View/Add Comment  Download reader
Received:March 19, 2017  Revised:July 10, 2017
DOI:
Key words: AZ31 magnesium alloy  cryogenic treatment  second phase particles  fracture morphology
Foundation item:国家自然科学基金青年项目(51604181),山西煤基低碳联合基金(U1510131),山西省重点研发计划(201603D121010),山西省应用基础研究计划(201601D021095),山西省高等学校科技创新项目(2015172)
Author NameAffiliation
Huang Zhiquan,Wei Jianchun,Huang Qingxue,Ma Lifeng,Gao Xiangyu and Yue Zhaohan  
Hits: 29
Download times: 6
Abstract:
      The effects of cryogenic treatment prior hot rolling on the strength toughness and ductility of as-cast AZ31 magnesium alloy plate was investigated in this study. The cryogenic treatment conditions were ?60 °C/12 h, ?120 °C/12 h, ?180 °C/12 h, ?60 °C/2 h, and ?180 °C/2 h. Experimental results indicated that appropriate cryogenic treatment conditions can significantly refine the grain size and the strength, toughness and ductility were also improved. A large number of twins appeared in both kinds of samples cryogenically treated for 2 h. The grain size of the sample, which experienced cryogenic treatment for 12 h at ?60 °C followed by rolling process was the finest and most uniform. By increasing cryogenic treatment duration to 12 h, the yield strength of the AZ31 magnesium alloy was enhanced by 25.8% after rolling under ?60 °C cryogenic treatment temperature. Meanwhile, a four-time increase in extension rate (3.06% to 12.31%) was attained. The tensile fracture presented a mixed-mode fracture, which is characteristic of brittle and ductile fracture mechanisms.