含LPSO相Mg_(94)Y_4Zn_1Ni_1合金的组织和力学性能
Microstructure and Mechanical Properties of Mg_(94)Y_4Zn_1Ni_1 Alloy with Long Period Stacking Ordered (LPSO) Phase
查看参考文献19篇
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文摘
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采用OM、SEM、TEM和电子万能试验机研究了Mg_(94)Y_4Zn_1Ni_1(at%)合金在铸态、退火、挤压和时效态的显微组织与力学性能。结果表明:铸态合金组织由胞状α-Mg相、网状18R LPSO相和块状Mg_(24)(Y, Zn, Ni)_5相组成。退火后,合金中未析出14H LPSO相。经挤压变形,18R LPSO相转变为长条状并沿挤压方向排列,挤压态合金的抗拉强度达到417 MPa,显著高于铸态和退火态合金。经过T5和T6时效处理,在合金的基体中析出大量细小的共格β'沉淀相,合金得到进一步强化。T5态和T6态合金的抗拉强度分别为434和432 MPa,屈服强度均高于300 MPa。 |
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其他语种文摘
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The microstructure and mechanical properties of Mg_(94)Y_4Zn_1Ni_1 alloy in as-cast, as-annealed, as-extruded and aged states were investigated by OM, SEM, TEM and electronic universal testing machine. Results show that the as-cast alloy is composed of α-Mg matrix, 18R long period stacking ordered (LPSO) structure and Mg_(24)(Y, Zn, Ni)_5 phase. During hot extrusion, the 18R phases become stripy and are aligned in lines along the extrusion direction. The ultimate tensile strength of as-extruded alloy reaches 417 MPa. After aging, a large number of coherent β' phases are precipitated in α-Mg matrix, and as a result the strength of the alloy is enhanced further. The T5-treated and T6-treated alloys exhibit ultimate tensile strength of 434 and 432 MPa, respectively. |
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来源
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稀有金属材料与工程
,2017,46(4):1097-1102 【核心库】
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关键词
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Mg_(94)Y_4Zn_1Ni_1
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热挤压
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时效
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长周期相
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力学性能
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地址
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1.
河海大学, 江苏, 南京, 211100
2.
东南大学, 江苏, 南京, 211189
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南通大学, 江苏, 南通, 226019
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1002-185X |
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学科
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金属学与金属工艺 |
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基金
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江苏省自然科学基金
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文献收藏号
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CSCD:5973305
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