首页|热压制备Ni/Al微叠层复合板的协调变形行为和气压胀形成形性

热压制备Ni/Al微叠层复合板的协调变形行为和气压胀形成形性

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为了制造NiAl合金复杂薄壁构件,采用真空热压法制备一种新型Ni/Al微叠层复合板(NAMCS).基于不同温度的单向拉伸试验,研究Ni/Al微叠层复合板的力学性能.为了阐明Ni/Al微叠层复合板的单向拉伸协调变形机制,通过扫描电子显微镜对不同拉伸应变下的变形组织进行表征.结果表明,在5％应变、室温和300 ℃条件下,NiAl3层和Ni2Al3层中形成了一些裂纹.在600 ℃和20％应变条件下,在NiAl3层观察到一些微孔.样品在78.7％的拉伸应变断裂时,Ni2Al3层也未出现裂纹,表现出良好的协调变形能力.Ni/Al微叠层复合板的高温自由气压胀形试验表明,600 ℃时其极限胀形比(极限胀形高度与凹模直径之比)达到33.3％,表现出良好的成 形性.
Coordinated deformation behavior and gas bulging formability of hot-pressed Ni/Al micro-laminated composite sheet
To fabricate NiAl complex thin-walled components,a novel Ni/Al micro-laminated composite sheet(NAMCS)was prepared by vacuum hot-pressing.Based on the uniaxial tensile tests at different temperatures,the mechanical properties of NAMCS were investigated.To clarify the uniaxial tensile coordinated deformation mechanism of NAMCS,the deformed micro structure at different tensile strains was characterized by scanning electron microscopy.The results showed that some cracks formed in NiAl3 and Ni2Al3 layers at a tensile strain of 5％,room temperature and 300 ℃.At 600 ℃ and a tensile strain of 20％,some microvoids were observed in the NiAl3 layers,but no cracks formed in the Ni2Al3 layers until the sample fractured at a tensile strain of 78.7％.This indicated a good coordinated deformation ability.The high-temperature free gas bulging test of NAMCS showed that the limit bulging ratio(the ratio of limit bulging height to die diameter)of NAMCS at 600 ℃ reached 33.3％,implying good formability.

Ni/Al micro-laminated composite sheetmechanical propertiescoordinated deformation mechanismgas bulgingformability

鲁羽鹏、殷宏亮、席先铮、孟令健、林鹏、梁伟

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太原理工大学材料科学与工程学院,太原 030024

太原理工大学先进金属复合材料成形技术与装备教育部工程研究中心,太原 030024

Ni/Al微叠层复合板 力学性能 协调变形机制 气压胀形 成形性

国家自然科学基金Applied Basic Research Program of Shanxi Province,ChinaApplied Basic Research Program of Shanxi Province,China

515053232021030212311720210302124658

2024

10.1016/S1003-6326(23)66434-9

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(3)
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