Effect of microalloyed Al and Ca on mechanical properties and corrosion resistance of high-speed extruded Mg-2Zn-1Mn (mass%) alloy
Effect of microalloyed Al and Ca on mechanical properties and corrosion resistance of high-speed extruded Mg-2Zn-1Mn (mass%) alloy
复制标题
效果%20of%20微合金化%20Al%20和%20Ca%20on%20机械%20性能%20和%20腐蚀%20电阻%20of%20高速%20挤压%20Mg-2Zn-1Mn%20(质量%)%20合金
DOI：
10.1016/j.matchar.2022.112121
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发表时间：
2022
影响因子：
4.7
通讯作者：
S. Kamado
中科院分区：
文献类型：
--
作者：
T. Nakata;C. Xu;H. Yamato;L. Geng;S. Kamado
研究了高速挤压Mg-2 Zn-1 Mn（质量分数）合金中添加Al和/或Ca后的力学性能和耐腐蚀性能。Al的微合金化提高了合金的拉伸屈服强度，而压缩屈服强度基本保持不变，恶化了屈服各向异性。Al的加入也使合金的耐蚀性下降，因为合金中形成了粗大的βMn相，促进了电偶腐蚀。通过单独添加Ca，拉伸和压缩屈服强度均增加，从而导致屈服各向异性略有改善。一个织构弱化，这是由于单一的Ca此外，也略有改善的延展性。在不损失耐腐蚀性的情况下实现了这样的性能改进。一个粘塑性自洽模拟表明，单一的钙除了是有效的硬化的基础和棱柱滑移，这提高了屈服强度在拉伸和压缩。
Mechanical properties and corrosion resistance of high-speed extruded Mg-2Zn-1Mn (mass%) alloys microalloyed with Al and/or Ca were evaluated. The microalloying of Al improved the tensile yield strength, while the compressive yield strength remained unchanged, which deteriorated the yield anisotropy. The Al addition also deteriorated the corrosion resistance owing to the formation of coarse βMn phases that promoted the galvanic corrosion. By the single addition of Ca, both tensile and compressive yield strengths increased, which led to a slight improvement of the yield anisotropy. A texture weakening, which was attributed to the single Ca addition, also improved the ductility slightly. Such property improvements were achieved without the loss of corrosion resistance. A ViscoPlastic Self-Consistent simulation revealed that the single Ca addition was effective for the hardening of both basal and prismatic slips, which improved the yield strength in both tension and compression.