全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

AZ61镁合金热压缩流变应力的实验

DOI: 10.11830/ISSN.1000-5013.2009.03.0248

Keywords: 镁合金, 热变形, 流变应力, 激活能, 应变速率

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用Gleeble-1500型热模拟机,对AZ61镁合金进行高温压缩实验,分析该合金在不同变形温度与应变速率条件下的压缩流变应力.研究AZ61镁合金在热变形时,流变应力与变形温度、应变速率之间的关系,并建立相应的流变应力模型.结果表明,AZ61镁合金在高温压缩变形时,当变形温度一定时,流变应力随应变速率的增大而增大; 而当应变速率一定时,流变应力随变形温度的升高而降低.AZ61镁合金的热变形过程均表现出较明显的动态再结晶特征,其流变应力的变化规律主要受加工硬化和再结晶软化两者机制的共同作用.在热变形下,AZ61镁合金峰值流变应力可以用双曲正弦模型来进行较好的描述.

References

[1]  MORDIKE B L, EBERT T. Magnesium properties-application-potential [J]. Mater Sci Eng (A), 2001, (302):37-45.
[2]  FRIEDRICH H, SCHUMANN S. Research for a "new age of magnesium" in the automotive industry [J]. Journal of Materials Processing Technology, 2001, (117):276-281.doi:10.1016/S0924-0136(01)00780-4.
[3]  马图哈 K H, 师昌绪. 非铁合金的结构与性能 [A]. 北京:科学出版社, 1999.
[4]  TAKUDA H, FUJIMOTO H, HATTA N. Modelling on flow stress of Mg-Al-Zn alloys at elevated temperatures [J]. J Mater Process Teeh, 1998, (80/81):513-516.
[5]  范永革, 汪凌云, 黄光胜. 变形镁合金高温变形流变应力分析 [J]. 重庆大学学报(自然科学版), 2003(2):9-11.doi:10.3969/j.issn.1000-582X.2003.02.003.
[6]  GALIYEV A, KAIBYSHEV R, SAKAI T. Continuous dynamic recrystallization in magnesium alloys [J]. Materials Science Forum, 2003, (419/422):509-514.
[7]  TAN J C, TAN M J. Dynamic continuous recrystallization characteristics in two srage deformation of Mg-3Al-1Zn alloy sheet [J]. Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing, 2003, (339):124-132.
[8]  Poirier J P, 关德林. 晶体的高温塑性变形 [M]. 大连:大连理工大学出版社, 1989.
[9]  MCQUEEN H J, RYAN N D. Constitutive analysis in hot working [J]. Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing, 2002, (322):43-63.
[10]  GRONOSTAJSKI Z J. Model describing the characteristic values of flow stress and strain of brass M63 and aluminium bronze BA93 [J]. Journal of Materials Processing Technology, 1998, (78):84-89.doi:10.1016/S0924-0136(97)00467-6.
[11]  IMBERT C A C, MCQUEEN H J. Peak strength, strain hardening and dynamic restoration of A2 and M2 tool steels in hot deformation [J]. Mater Sei Eng (A), 2001, (313):88-103.
[12]  LIU Jian-tao, CHANG Hong-bing, WU Rui-hang. Investigation on hot deformation behavior of AISI T1 high-speed steel [J]. Materials Characterization, 2000(3):175-186.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133