锻压技术

微合金化对Al-Cu-Li-Zr合金拉伸性能和微观组织的影响

英文标题：Influences of microalloying on tensile properties and microstructure of alloy Al-Cu-Li-Zr

分类号：

出版年,卷(期):页码：2015,40(7):131-135

摘要：

通过拉伸测试和TEM观察研究了Mg、Zn、Mn微合金化对Al-Cu-Li-Zr合金力学性能和微观组织的影响。结果表明：与基础合金相比，Mg、Zn、Mn微合金化的Al-3.1Cu-2.1Li-0.1Zr合金T6时效时的强度较高，峰值强度提高约40 MPa，且在低温T8时效时的时效响应速率明显加快，同时具有较低的各向异性。Al-Cu-Li-Zr合金的析出相为大量δ′相、T1相和少量θ′相。T6时效时，微合金元素的添加显著增大δ′相、T1相和θ′相的析出密度，且出现少量S′相。低温T8时效时，微合金元素的添加有效促进δ′相和T1相细小弥散地析出。

Influences of microalloying Mg, Zn, Mn on tensile properties and microstructure of alloy Al-Cu-Li-Zr were investigated by tensile test and TEM observation. Results show that compared with base alloy, the microalloying Mg, Zn, Mn alloy Al-3.1Cu-2.1Li-0.1Zr has higher strength after T6 aging, whose peak is improved by about 40 MPa. And the aging response of microalloying alloy is faster under T8 condition. Meanwhile, the anisotropy index of the strength of microalloyed alloy is lower. The main precipitated phases of alloy Al-Cu-Li-Zr increase for δ′, T1 and decrease for θ′. During T6 aging, the precipitated densities of δ′, T1 and θ′ are obviously improved by adding micro alloy, meanwhile less S′ phase is observed. During T8 aging, more disperse phases of δ′, T1 are effectively precipitated by adding microalloying elements.

基金项目：

国家高技术研究发展计划（863计划）资助项目（2013AA032401）

张健（1990-），男，硕士研究生

参考文献：

[1]吴瑶, 许晓静, 张振强, 等. 预回复退火2099铝锂合金挤压材的组织和位错强化[J]. 稀有金属, 2015,39 (2):187-192.

Wu Y, Xu X J, Zhang Z Q, et al. Microstructure and dislocation strengthening of pre-recovery-anneal 2099 Al-Li alloy extrusions[J]. Chinese Journal of Rare Metals, 2015,39(2):187-192.

[2]魏齐龙, 陈铮, 刘兵, 等. 电场时效对铝锂合金性能和断裂特征的影响[J]. 稀有金属, 2002, 26(3):161-165.

Wei Q L, Chen Z, Liu B, et al. Effect of aging treatment under electric field on properties and fracture characteristics of Al-Li alloys[J]. Chinese Journal of Rare Metals, 2002, 26(3):161-165.

[3]李劲风, 郑子樵, 陈永来, 等. 铝锂合金及其在航天工业上的应用[J]. 宇航材料工艺, 2012, 42(1): 13-19.

Li J F, Zheng Z Q, Chen Y L, et al. Application of Al-Li alloy on the aerospace industry[J]. Aerospace Materials & Technology, 2012, 42(1): 13-19.

[4]朱小辉, 郑子樵, 钟申. Mg和Zn对2099合金时效组织与拉伸性能的影响[J]. 中国有色金属学报, 2010, 20(10):1861-1867.

Zhu X H, Zheng Z Q, Zhong S. Effect of Mg and Zn on microstructure and tensile properties of 2099 alloy[J]. The Chinese Journal of Nonferrous Metals,2010，20(10):1861-1867.

[5]Gable B M, Pana M A, Shiflet G J. The role of trace addition on the T1 coarsening behavior in Al-Li-Cu-X alloys[J]. Materials Science Forum, 2002, 396(2): 699-704.

[6]Jata K V, Hopkins A K, Rioja R J. The anisotropy and texture of Al-Li alloys [J]. Mat. Sci. Forum., 1996,217/222: 647-652.

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