预时效对Al-Zn-Mg-Cu合金热变形行为与微观组织演变规律的影响

doi:10.11900/0412.1961.2024.00348

金属学报 DOI: 10.11900/0412.1961.2024.00348

本期目录 | 过刊浏览

预时效对Al-Zn-Mg-Cu合金热变形行为与微观组织演变规律的影响

王振瑜^1,2,石全强¹,范然³,崔丽⁴,王威¹

1 中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016

2 中国科学技术大学材料科学与工程学院沈阳 110016

3 空装驻沈阳地区第一军事代表室沈阳 110843

4 沈阳飞机工业集团有限公司沈阳 110039

Effect of pre-aging treatment on the hot deformation behavior and microstructure evolution of Al-Zn-Mg-Cu alloy

WANG Zhenyu^1,2, SHI Quanqiang ¹, FAN Ran³, CUI Li ⁴, WANG Wei ¹

1 Shi-changxu Innovation Center for Advanced Materials, Institute of Metals, Chinese Academy of Sciences, Shenyang 110016, China

2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

3 Office of the First Military Representative of the Air Force in the Shenyang area, Shenyang 110843, China

4 Shenyang Aircraft Corporation, Shenyang 110039, China

引用本文:

王振瑜石全强范然崔丽王威. 预时效对Al-Zn-Mg-Cu合金热变形行为与微观组织演变规律的影响[J]. 金属学报, DOI: 10.11900/0412.1961.2024.00348.

全文: PDF(6121 KB)

摘要:

针对航空用Al-Zn-Mg-Cu合金在热力耦合环境下服役的情况，通过热模拟实验研究了预时效处理对Al-Zn-Mg-Cu合金热变形行为的影响。热模拟流变应力曲线显示：在0.01 s^-1低应变速率下，在室温和473 K热变形过程中固溶态合金的流变应力高于时效态，而在573~743 K范围内时效态合金的流变应力超过固溶态，随着温度升高，流变应力差值降低；在0.5 s^-1高应变速率下，固溶态与时效态流变应力差值在743 K异常增大。通过SEM、EBSD和TEM等手段研究了时效态与固溶态Al-Zn-Mg-Cu合金的微观组织演变规律。结果表明，在低应变速率下，473~573 K区间内，时效态Al-Zn-Mg-Cu合金存在的高密度析出相缠结位错，较低的形变储能与较高的热变形激活能抑制基体发生动态回复(DRV)，变形抗力得到提高；673 K时，析出相的不连续粗化和形变储能的提高使时效态Al-Zn-Mg-Cu合金的DRV体积分数大幅提升；743 K时未完全回溶的小尺寸球状颗粒钉扎位错提高了形变储能，促进基体发生动态再结晶(DRX)，使时效态Al- Zn- Mg- Cu合金与固溶态流变应力相近。在高应变速率下，时效态Al-Zn-Mg-Cu合金出现几何动态再结晶，进一步提高了DRX的体积分数，从而降低了时效态Al-Zn-Mg-Cu合金的流变应力。

关键词 ： Al-Zn-Mg-Cu合金, 预时效, 热变形行为, 析出相, 动态软化

Abstract：The effect of pre-ageing treatment on the hot deformation behavior of Al-Zn-Mg-Cu alloys is studied by thermal simulation experiments. Thermal simulation of the flow stress curves showed: at a low strain rate of 0.01s-1, the flow stress is higher than that of the aging state in the solid solution state during hot deformation at room temperature and 473 K, While the flow stress in the aging state exceeds that in the solid solution state at 573K-743K, and the difference of the flow stresses decreases with the increase of the temperature; At a high strain rate of 0.5s-1, the difference between the flow stresses of the solid solution state and the aged state increases abnormally at 743K. The microstructural evolution of the aged and solid solution Al-Zn-Mg-Cu alloys was studied by means of SEM, EBSD, and TEM for the above phenomena, and the results showed: at low strain rate, the high density of precipitates entangled dislocations at 473 K-573 K, the low deformation storage energy and the high thermal deformation activation energy of the aged Al-Zn-Mg-Cu alloys resulted in the un-recovery of the matrix, and the deformation resistance is improved; At 573 K-743 K, the discontinuous coarsening of the precipitates and the increase of deformation storage energy increase the DRV volume fraction of the aged Al-Zn-Mg-Cu alloy, and the small-sized spherical particles of which pinning dislocations increase the deformation storage energy and the volume fraction of DRX as the temperature increases, so that the Al-Zn-Mg-Cu alloy under aged state has a similar flow stress to the solid-solution flow stress. At high strain rates, the appearance of GDRX in the aged Al-Zn-Mg-Cu alloy at high strain rates further increased the volume fraction of DRX, which reduced the flow stress of Al-Zn-Mg-Cu alloys.

Key words： Al-Zn-Mg-Cu alloy Pre-aging Hot deformation Mechanical behavior Precipitates Dynamic softening

收稿日期: 2024-10-18

ZTFLH:

TG156.1

基金资助:纳米相复合强化不锈钢中亚稳相过渡析出行为及强化机制研究

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王振瑜
	石全强
	范然
	崔丽
	王威
44.8K

链接本文:

https://www.ams.org.cn/CN/Y0/V/I/0

[1]	姜沐池, 宫继双, 杨兴远, 任德春, 蔡雨升, 李秉洋, 吉海宾, 雷家峰. Ti₃₀Ni₅₀Hf₂₀ 高温形状记忆合金的热变形行为[J]. 金属学报, 2025, 61(6): 857-865.
[2]	包成利, 李豪, 胡励, 周涛, 唐明, 何曲波, 刘相果. 固溶态Mg-10Gd-6Y-1.5Zn-0.5Zr合金热加工图构建及微观组织演变[J]. 金属学报, 2025, 61(4): 632-642.
[3]	张胜煜, 马庆爽, 余黎明, 张竟文, 李会军, 高秋志. 预时效处理对冷轧含Al奥氏体耐热钢组织和性能的影响[J]. 金属学报, 2025, 61(1): 177-190.
[4]	刘光辉, 王卫国, Rohrer Gregory S, 陈松, 林燕, 童芳, 冯小铮, 周邦新. 高温压缩变形Al-Zn-Mg-Cu合金动态再结晶后的{111}/{111}近奇异晶界[J]. 金属学报, 2024, 60(9): 1165-1178.
[5]	曹姝婷, 赵剑, 巩桐兆, 张少华, 张健. Cu含量对K4061合金显微组织和拉伸性能的影响[J]. 金属学报, 2024, 60(9): 1179-1188.
[6]	柯于斌, 李彬, 段辉平. 利用小角中子核磁散射分离研究AerMet100钢中纳米析出相的形貌和成分[J]. 金属学报, 2024, 60(8): 1109-1118.
[7]	许仁杰, 屠鑫, 胡斌, 罗海文. Cu-V双合金化3Mn钢的组织和力学性能[J]. 金属学报, 2024, 60(6): 817-825.
[8]	李龙健, 李仁庚, 张家郡, 曹兴豪, 康慧君, 王同敏. 低温轧制对高强高导Cu-1Cr-0.2Zr-0.25Nb合金性能及析出行为的影响[J]. 金属学报, 2024, 60(3): 405-416.
[9]	杨彬彬, 宋元元, 郝龙, 姜海昌, 戎利建. 含3%Cu低碳马氏体不锈钢0Cr13Ni4Mo的显微组织及耐腐蚀性能[J]. 金属学报, 2024, 60(12): 1656-1666.
[10]	郑雄, 赖玉香, 向雪梅, 陈江华. 稀土元素La对AlMgSi合金性能和微结构的影响[J]. 金属学报, 2024, 60(1): 107-116.
[11]	王宗谱, 王卫国, Rohrer Gregory S, 陈松, 洪丽华, 林燕, 冯小铮, 任帅, 周邦新. 不同温度轧制Al-Zn-Mg-Cu合金再结晶后的{111}/{111}近奇异晶界[J]. 金属学报, 2023, 59(7): 947-960.
[12]	梁凯, 姚志浩, 谢锡善, 姚凯俊, 董建新. 新型耐热合金SP2215组织与性能的关联性[J]. 金属学报, 2023, 59(6): 797-811.
[13]	芮祥, 李艳芬, 张家榕, 王旗涛, 严伟, 单以银. 新型纳米复合强化9Cr-ODS钢的设计、组织与力学性能[J]. 金属学报, 2023, 59(12): 1590-1602.
[14]	马国楠, 朱士泽, 王东, 肖伯律, 马宗义. SiC颗粒增强Al-Zn-Mg-Cu复合材料的时效行为和力学性能[J]. 金属学报, 2023, 59(12): 1655-1664.
[15]	陈凯旋, 李宗烜, 王自东, Demange Gilles, 陈晓华, 张佳伟, 吴雪华, Zapolsky Helena. Cu-2.0Fe合金等温处理过程中富Fe析出相的形态演变[J]. 金属学报, 2023, 59(12): 1665-1674.

Viewed

Full text

Abstract

Cited

Shared

Discussed