挤压态AZ40镁合金热变形行为及热加工图分析

doi:10.11868/j.issn.1001-4381.2021.000136

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摘要

采用Gleeble-3500热模拟试验机对挤压态AZ40合金进行热压缩实验，分析压缩后不同温度真应力-应变曲线的变化趋势，得到流变应力受变形温度和应变速率等因素的影响规律；在双曲正弦关系的基础上构造挤压态AZ40合金的本构方程，在动态材料模型（DMM）基础上建立挤压态AZ40合金的热加工图，从而确定挤压态AZ40镁合金的热变形加工范围。结果表明：明显的动态再结晶是挤压态AZ40镁合金流变曲线的特点，在压缩过程中，随变形温度的升高，挤压态AZ40镁合金的峰值应力减小；随应变速率升高，挤压态AZ40镁合金的峰值应力增大。当变形温度相同时，动态再结晶晶粒比例随着应变速率的升高而降低；当应变速率相同时，动态再结晶晶粒大小随着变形温度的升高而增大。粗大的未再结晶晶粒有明显的〈10${\rm{\bar 1}}$0〉‖ND和〈2${\rm{\bar 1}}$${\rm{\bar 1}}$0〉‖ND两种取向，而再结晶晶粒取向随机；通过热加工图及组织分析，确定了最佳的加工工艺为T=573 K，$\dot \varepsilon $=0.1 s^-1。

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	支盛兴
	李兴刚
	袁家伟
	李永军
	马鸣龙
	石国梁
	张奎

关键词 ： AZ40合金, 热变形, 本构方程, 热加工图, 织构

Abstract：

The Gleeble-3500 thermal simulation tester was used to perform hot deformation behavior on the extruded AZ40 Mg alloy to analyze the trend of the true stress-strain curve after compression and to obtain the influence of the flow stress on the deformation temperature and strain rate. Subsequently, the constitutive equation was constructed for extruded AZ40 alloy based on the hyperbolic-sine relationship, and the thermal processing map of extruded AZ40 alloy was established based on the dynamic material model (DMM), thereby estimating the processing range of extruded AZ40 alloy. The results show that the rheological curve of extruded AZ40 alloy is characterized by obvious dynamic recrystallization. Furthermore, during the compression process, the peak stress of extruded AZ40 alloy decreases with the increase of deformation temperature, while increases with the increase of strain rate. Moreover, the proportion of dynamic recrystallized grains (DRGs) decreases with the increase of the strain rate under the same deformation temperature condition; while the DRGs size increases with the increase of the deformation temperature under the same strain rate condition. The coarse uncrystallized grains show obvious crystallographic orientations of 〈10${\rm{\bar 1}}$0〉‖ND and 〈2${\rm{\bar 1}}$${\rm{\bar 1}}$0〉‖ND, while crystallographic orientation of DRGs is random distributed. Finally, through thermal processing map and tissue analysis, the optimal processing window was identified as T=573 K, $\dot \varepsilon $=0.1 s^-1.

Key words： AZ40 alloy hot deformation constitutive equation processing map texture

收稿日期: 2021-02-09 出版日期: 2021-11-12

中图分类号:

TG146.2

通讯作者: 李兴刚 E-mail: lxg1218@grinm.com

作者简介: 李兴刚(1970-), 高工, 博士, 主要研究方向为先进镁合金材料制备加工技术开发, 联系地址: 北京市海淀区北三环中路43号院北京有色金属研究总院(100089), E-mail: lxg1218@grinm.com

引用本文:

支盛兴, 李兴刚, 袁家伟, 李永军, 马鸣龙, 石国梁, 张奎. 挤压态AZ40镁合金热变形行为及热加工图分析[J]. 材料工程, 2021, 49(11): 136-146.
Sheng-xing ZHI, Xing-gang LI, Jia-wei YUAN, Yong-jun LI, Ming-long MA, Guo-liang SHI, Kui ZHANG. Analysis of hot deformation behavior and processing map of extruded AZ40 alloy. Journal of Materials Engineering, 2021, 49(11): 136-146.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2021.000136 或 http://jme.biam.ac.cn/CN/Y2021/V49/I11/136

Table 1 AZ40合金中各元素含量 (质量分数/%)

Fig.1 热压缩实验示意图

Fig.2 挤压态AZ40合金ED方向金相组织
(a)低倍；(b)高倍

Fig.3 挤压态AZ40合金极图

Fig.4 AZ40镁合金不同温度下真应力-真应变曲线
(a)543 K; (b)573 K; (c)603 K; (d)633 K

Fig.5 峰值应力与应变速率的关系
(a)σ-

；(b)lnσ-

Fig.6 ln[sinh(ασ)]与应变速率及温度的关系
(a)ln[sinh(ασ)]-

；(b)ln[sinh(ασ)]-1/T；

Fig.7 lnZ-ln[sinh(ασ)]关系曲线图

Fig.8 材料常数与应变关系
(a)α；(b)n；(c)Q；(d)lnA

Table 2 式(11)中多项式系数

Fig.9 不同温度和应变速率下流动应力预测值与实验结果的对比
(a)543 K; (b)573 K; (c)603 K; (d)633 K

Fig.10 AZ40合金不同变形条件下的EBSD组织观察
(a)T=543 K，

=0.1 s^-1；(b)T=573 K，

=0.1 s^-1；(c)T=603 K，

=0.1 s^-1；(d)T=573 K，

=1.0 s^-1

Fig.11 AZ40合金不同变形条件下的平均晶粒尺寸
(a)T=543 K，

=0.1 s^-1；(b)T=573 K，

=0.1 s^-1；(c)T=603 K，

=0.1 s^-1；(d)T=573 K，

=1.0 s^-1

Fig.12 挤压态AZ40合金应变速率敏感指数m图

Fig.13 挤压态AZ40合金热加工图

1	DAI X J , YANG X , JING L , et al. Research progress in ultrafine grain magnesium alloy by equal channel angular pressing[J]. Chinese Journal of Rare Metals, 2020, 44 (12): 96- 103.
2	LI X X , LIU Z , WANG Y , et al. Hot tearing defects of as-cast Mg-xZn-0.5Y-0.5Zr alloys[J]. Chinese Journal of Rare Metals, 2020, 44 (7): 697- 705.
3	王林, 张世林, 平恩顺, 等. 可降解桥塞研制及其性能评价[J]. 科学技术与工程, 2017, 17 (24): 228- 232. doi: 10.3969/j.issn.1671-1815.2017.24.039
3	WANG L , ZHANG S L , PING E S , et al. Development and performance evaluation of the degradable bridge plug[J]. Science Technology and Engineering, 2017, 17 (24): 228- 232. doi: 10.3969/j.issn.1671-1815.2017.24.039
4	刘辉, 喻冰, 杨海, 等. 可溶桥塞镶齿卡瓦研制及实验评价[J]. 钻采工程, 2018, 41 (6): 76- 78.
4	LIU H , YU B , YANG H , et al. Development and experimental evaluation of insert slip for dissolvable bridge plug[J]. Drilling & Production Technology, 2018, 41 (6): 76- 78.
5	刘统亮, 施建国, 冯定, 等. 水平井可溶桥塞分段压裂技术与发展趋势[J]. 石油机械, 2020, 48 (10): 103- 110.
5	LIU T L , SHI J G , FENG D , et al. Technical status and development trend of staged fracturing with dissoluble bridge plug in horizontal well[J]. China Petroleum Machinery, 2020, 48 (10): 103- 110.
6	陈振华. 镁合金[M]. 北京: 化学工业出版社, 2004.
6	CHEN Z H . Magnesium alloy[M]. Beijing: Chemical Industry Press, 2004.
7	YAMASHITA A , HORITA Z , LANGDON T G , et al. Improving the mechanical properties of magnesium alloy through severe plastic deformation[J]. Materials Science and Engineering: A, 2001, 300 (1/2): 142- 147.
8	XU C , FURUKAWA M , HORITA Z . The evolution of homogeneity and grain refinement during equal-channel angular pressing: a model for grain refinement in ECAP[J]. Materials Science and Engineering: A, 2005, 398 (1/2): 66- 76.
9	SEGAL V M , REZNIKOVVI , DROTYSHEVKIJAE A , et al. Plastic working of metals by simple shear[J]. Russian Metallugy, 1981, 1, 99- 105.
10	JAMALI A , MAHMUDI R . Evolution of microstructure, texture, and mechanical properties in a multi-directionally forged zk60 mg alloy[J]. Materials Science and Engineering: A, 2019, 752, 55- 62. doi: 10.1016/j.msea.2019.02.095
11	XIA X S , CHEN Q , ZHAO Z D , et al. Microstructure, texture and mechanical properties of coarse-grained Mg-Gd-Y-Nd-Zr alloy processed by multidirectional forging[J]. Journal of Alloys and Compounds, 2015, 623, 62- 68. doi: 10.1016/j.jallcom.2014.10.084
12	CHEN C , SONG L H , DU X H , et al. Enhanced mechanical property of AZ31B magnesium alloy processed by multi-directional forging method[J]. Materials Characterization, 2017, 131, 72- 77. doi: 10.1016/j.matchar.2017.05.010
13	刘克威, 谭安平. AZ40M镁合金的Fields-Backofen模型及加工图[J]. 特种铸造及有色合金, 2020, 40 (2): 143- 147.
13	LIU K W , TAN A P . Fields-Backofen model and processing map of AZ40M alloy[J]. Special Casting & Nonferrous Alloy, 2020, 40 (2): 143- 147.
14	蔡志伟, 陈拂晓, 郭俊卿. AZ41M镁合金热变形行为及本构方程[J]. 材料热处理学报, 2015, 36 (11): 65- 71.
14	CAI Z W , CHEN F X , GUO J Q . Hot deformation behavior and constitutive equation of AZ41M magnesium alloy[J]. Transactions of Materials and Heat Treatment, 2015, 36 (11): 65- 71.
15	翟显伟, 秦聪祥. AZ41镁合金热变形动力学及其应变硬化行为的研究[J]. 热加工工艺, 2013, 42 (10): 103- 105.
15	ZHAI X W , QIN C X . Study on hot deformation kinetics and strain hardening[J]. Hot Working Technology, 2015, 36 (11): 65- 71.
16	SELLARS C M , MCTEGAR W J . On the mechanism of hot deformation[J]. Acta Metallurgica, 1966, 14 (9): 1136- 1138. doi: 10.1016/0001-6160(66)90207-0
17	ZENER M , HOLLOMON J . Effect of strain rate upon plastic flow of steel[J]. Journal of Applied Physics, 1944, 15, 22- 23. doi: 10.1063/1.1707363
18	王家毅, 米振莉, 李辉, 等. 基于热加工图6082铝合金锻造工艺优化及强化机制研究[J]. 稀有金属, 2019, 43 (2): 113- 121.
18	WANG J Y , MI Z L , LI H , et al. Isothermal forging process and strengthening mechanism of 6082 aluminum alloy through processing map[J]. Chinese Journal of Rare Metals, 2019, 43 (2): 113- 121.
19	夏麒帆, 梁益龙, 杨春林, 等. TC4钛合金拉伸变形行为的研究[J]. 稀有金属, 2019, 43 (7): 765- 773.
19	XIA Q F , LIANG Y L , YANG C L , et al. Tensile deformation behavior of TC4 titanium alloy[J]. Chinese Journal of Rare Metals, 2019, 43 (7): 765- 773.
20	MA Q , LI B , WHITTINGTON W R , et al. Texture evolution during dynamic recrystallization in a magnesium alloy at 450℃[J]. Acta Materialia, 2014, 67, 102- 115.
21	PRASAD Y V R K , GEGEL H L , DORAIVELU S M , et al. Modeling of dynamic material behavior in hot deformation: forging of Ti-6242[J]. Metall Trans A, 1984, 15 (10): 1883- 1892.

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