Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets

doi:10.1007/s12204-019-2092-4

Journal of Shanghai Jiao Tong University (Science) ›› 2019, Vol. 24 ›› Issue (4): 409-416.doi: 10.1007/s12204-019-2092-4

• • 下一篇

Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets

LIU Kai (刘凯), DONG Xianghuai *(董湘怀), SHI Wen (石文), WANG Xinbao (王新宝), WU Guohong (吴国洪)

(1. National Engineering Research Center of Die & Mold CAD, Shanghai Jiao Tong University, Shanghai 200030, China; 2. Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China; 3. Dongguan Hengli Mold Technology Industry Development Co., Ltd., Dongguan 523470, Guangdong, China)

出版日期:2019-08-01 发布日期:2019-07-29
通讯作者: DONG Xianghuai *(董湘怀) E-mail:dongxh@sjtu.edu.cn

Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets

LIU Kai (刘凯), DONG Xianghuai *(董湘怀), SHI Wen (石文), WANG Xinbao (王新宝), WU Guohong (吴国洪)

(1. National Engineering Research Center of Die & Mold CAD, Shanghai Jiao Tong University, Shanghai 200030, China; 2. Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China; 3. Dongguan Hengli Mold Technology Industry Development Co., Ltd., Dongguan 523470, Guangdong, China)

Online:2019-08-01 Published:2019-07-29
Contact: DONG Xianghuai *(董湘怀) E-mail:dongxh@sjtu.edu.cn

摘要/Abstract

摘要： Two new types of electrically-assisted forming (EAF) processes of AZ31B magnesium alloy sheets, i.e., electrically-assisted blanking (EAB) and electrically-assisted sheet upset-extruding (EASUE), are proposed in this paper. During EAB, pulsed current (PC) decreases blanking load and improves blanked surface quality, and higher frequency has a more effective improvement; when the frequency reaches 600 Hz, the whole punched hole fracture is improved to smooth zone. Moreover, EAB does not influence the microstructure and does not induce obvious annealing, and this process is advantageous to the materials that cannot change microstructure. During EASUE, PC can reduce extrusion load and enhance extrusion height, and higher frequency also has a more effective improvement. Both processes indicate that introducing PC can effectively improve the part quality and have an application prospection.

关键词: electrically-assisted blanking (EAB) , electrically-assisted sheet upset-extruding (EASUE), pulsed current (PC), AZ31B magnesium alloy, electroplasticity

Abstract: Two new types of electrically-assisted forming (EAF) processes of AZ31B magnesium alloy sheets, i.e., electrically-assisted blanking (EAB) and electrically-assisted sheet upset-extruding (EASUE), are proposed in this paper. During EAB, pulsed current (PC) decreases blanking load and improves blanked surface quality, and higher frequency has a more effective improvement; when the frequency reaches 600 Hz, the whole punched hole fracture is improved to smooth zone. Moreover, EAB does not influence the microstructure and does not induce obvious annealing, and this process is advantageous to the materials that cannot change microstructure. During EASUE, PC can reduce extrusion load and enhance extrusion height, and higher frequency also has a more effective improvement. Both processes indicate that introducing PC can effectively improve the part quality and have an application prospection.

Key words: electrically-assisted blanking (EAB) , electrically-assisted sheet upset-extruding (EASUE), pulsed current (PC), AZ31B magnesium alloy, electroplasticity

中图分类号:

LIU Kai (刘凯), DONG Xianghuai *(董湘怀), SHI Wen (石文), WANG Xinbao (王新宝), WU Guohong. Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets[J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(4): 409-416.

LIU Kai (刘凯), DONG Xianghuai *(董湘怀), SHI Wen (石文), WANG Xinbao (王新宝), WU Guohong (吴国洪). Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets[J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(4): 409-416.

参考文献 14

[1]	TROITSKII O A. Electroplastic deformation of metal[J]. Strength of Materials, 1976, 8(12): 1466-1471.
[2]	CONRAD H. Thermally activated plastic flow of metals and ceramics with an electric field or current[J]. Materials Science and Engineering: A, 2002,322(1/2): 100-107.
[3]	SALANDRO W A, BUNGET C J, MEARS L. Several factors affecting the electroplastic effect during an electrically-assisted forming process [J]. Journal of Manufacturing Science and Engineering, 2011, 133(6):064503.
[4]	SALANDRO W A, BUNGET C, MEARS L. Electroplastic modeling of bending stainless steel sheet metal using energy methods [J]. Journal of Manufacturing Science and Engineering, 2011, 133(4): 041008.
[5]	KIM M J, LEE K, OH K H, et al. Electric currentinduced annealing during uniaxial tension of aluminum alloy [J]. Scripta Materialia, 2014, 75: 58-61.
[6]	ROH J H, SEO J J, HONG S T, et al. The mechanical behavior of 5052-H32 aluminum alloys under a pulsed electric current [J]. International Journal of Plasticity,2014, 58: 84-99.
[7]	LIU K, DONG X H, XIE H Y, et al. Influence of pulsed current on deformation mechanism of AZ31B sheets during tension [J]. Journal of Alloys and Compounds,2016, 676: 106-112.
[8]	LIU K, DONG X H, XIE H Y, et al. Effect of pulsed current on the deformation behavior of AZ31B magnesium alloy [J]. Materials Science and Engineering: A,2015, 623: 97-103.
[9]	TANG G Y, ZHANG J, YAN Y J, et al. The engineering application of the electroplastic effect in the colddrawing of stainless steel wire [J]. Journal of Materials Processing Technology, 2003, 137(1/2/3): 96-99.
[10]	XIE H Y, LIU K, WANG Q, et al. Experimental exploration of electrical pulse-assisted roller hemming of AZ31B magnesium alloy sheet [J]. Journal of Shanghai Jiao Tong University (Science), 2016, 21(5): 557-561.
[11]	XIE H Y, WANG Q, LIU K, et al. Investigation of influence of direct-current pulses on springback during V-bending of AZ31B magnesium alloy sheet [J]. Journal of Materials Processing Technology, 2015, 219:321-327.
[12]	DUDINA D V, ANISIMOV A G, MALI V I, et al.Smaller crystallites in sintered materials? A discussion of the possible mechanisms of crystallite size refinement during pulsed electric current-assisted sintering[J]. Materials Letters, 2015, 144: 168-172.
[13]	KIM W, YEOM K H, THIEN N T, et al. Electrically assisted blanking using the electroplasticity of ultrahigh strength metal alloys [J]. CIRP Annals - Manufacturing Technology, 2014, 63(1): 273-276.
[14]	XIE H Y, DONG X H, LIU K, et al. Experimental investigation on electroplastic effect of DP980 advanced high strength steel [J]. Materials Science and Engineering:A, 2015, 637: 23-28.

Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets

Investigation on Two Electrically-Assisted Forming Processes of AZ31B Magnesium Alloy Sheets

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 14

相关文章 6

编辑推荐

Metrics

本文评价

[1]	GAI Xin, (盖欣), BAI Yun (白芸), LI Shujun (李述军), WANG Liao (王燎), AI Songtao (艾松涛), HAO Yulin (郝玉琳), YANG Rui (杨锐), DAI Kerong (戴尅戎). Review on Corrosion Characteristics of Porous Titanium Alloys Fabricated by Additive Manufacturing[J]. J Shanghai Jiaotong Univ Sci, 2021, 26(3): 416-430.
[2]	TANG Wei-qin (唐伟琴), HUANG Shi-yao (黄诗尧), ZHANG Shao-rui (张少睿), LI Da-yong (李大永),. Polycrystalline Behavior Analysis of Extruded Magnesium Alloy AZ31[J]. 上海交通大学学报（英文版）, 2013, 18(2): 186-189.
[3]	WU Yu-juan1,2 (吴玉娟), PENG Li-ming1,2* (彭立明), ZHAO Su3 (赵素),LI De-jiang1,2* (李德江). Ignition-Proof Properties of a High-Strength Mg-Gd-Ag-Zr Alloy[J]. 上海交通大学学报（英文版）, 2012, 17(6): 643-648.
[4]	WAN Xiao-feng (万晓峰), NI Hong-jun (倪红军), HUANG Ming-yu (黄明宇). Improvements of Elevated Temperature Strength and Creep Resistance of Mg-12Zn-4Al Based Alloy with Calcium Addition[J]. 上海交通大学学报（英文版）, 2012, 17(3): 273-276.
[5]	JIANG Bin1 (姜斌), LIU Xu-he1 (刘旭贺), WU Rui-zhi1 (巫瑞智), ZHANG Mi-lin1 (张密林). Microstructures and Mechanical Properties of Various Mg-Li Wrought Alloys[J]. 上海交通大学学报（英文版）, 2012, 17(3): 297-300.
[6]	LI Ke (李克), WANG Fei (王飞), WANG Qian (王倩), ZHOU Nai-geng (周耐根). Grain Refining Mechanism of Carbon Inoculation on Mg-Al Alloy[J]. 上海交通大学学报（英文版）, 2012, 17(3): 301-305.