期刊文献+

热处理对压铸Mg-8Gd-3Y-0.5Zr合金组织性能的影响 被引量:2

Effects of Heat Treatment on Microstructure and Mechanical Properties of Die-Cast Mg-8Gd-3Y-0.5Zr Magnesium Alloy
下载PDF
导出
摘要 采用气体保护法制备Mg-8Gd-3Y-0.5Zr(GW83K)合金,并冷模压铸成拉伸试样。通过光学显微镜、扫描电镜观察及力学性能测试等分析合金压铸态和不同热处理状态下的显微组织及力学性能。结果表明:冷模压铸GW83K合金经热处理后,其力学性能较压铸态均有所提高,尤其是经低温短时固溶处理(T4)后的合金,其晶粒度变化不大,组织比较均匀,片层状的共晶体消失,第二相以不连续的棒状或粒状分布于晶界处。GW83K-T4合金的室温拉伸性能可达到σb=261.7MPa,σs=240.8MPa,δ5=6.0%,比压铸态合金分别提高了21%,28.4%和30.4%,且该合金具有较好高温力学性能。 Mg-8Gd-3Y-0.5Zr(GW83K) alloys were prepared by means of the atmosphere protection method and then chamber die cast into tensile samples with cold mould. The microstructures and mechanical properties of alloys in die-cast state and different heat treatment states were investigated by optical microscopy, scanning electron microscopy and mechanical property testing. The results show that the mechanical properties of the cold-mould die-cast GW83K alloys after heat treatment are improved. In particular, the die-cast GW83K alloy after short-time low-temperature solid solution treatment (T4) has a little variation in grain size and more uniform microstructure, lamellar eutectic disappears and the second phases distribute in the grain boundary in discontinuous rod shape or granule shape. Due to microstructure improvement of GW83K-T4 alloy, the mechanical properties of the alloy at room temperature are improved such as: σb=261.7 MPa, σs=240.8 MPa and σs=6.0%, which are increased by 21%, 28.4% and 30.4% compared with those of die-cast GW83K alloy respectively, and GW83K-T4 alloy has better elevated temperature mechanical properties.
机构地区 沈阳工业大学
出处 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2010年第3期502-506,共5页 Rare Metal Materials and Engineering
基金 "十一五"国家科技支撑计划(2006BA104B04)
关键词 稀土压铸镁合金 热处理 显微组织 力学性能 rare earth die-cast magnesium alloys heat treatment microstructure mechanical property
  • 相关文献

参考文献15

  • 1Mordike B L. Mater Science Engineers A[J], 2002, A324:103.
  • 2Maruyama K, Suzuki M, Sato H. Metal Mater Trans A[J],2002, A33(3): 875.
  • 3Negishi Y, Nishimura T, Iwasawa S et al. Light Metals[J], 1994, 44(10): 555.
  • 4Anyanwu I A, Kamado S, Kojima Y. Materials Transactions[J], 2001, 42(7): 1206.
  • 5Kawabata T, Matsuda K, Kamado S et al. Materials Science Forum[J], 2003, 419-422: 303.
  • 6GuoWangchun(郭永春) LiuTao(刘涛) LiJianping(李建平)etal.西安理工大学学报,2007,27(3):242-242.
  • 7Taniike S, Kitaquchi Y et al. Keikinzoku/Journal of Japan Institute of Light Metals[J], 1997, 47(5): 261.
  • 8Thaddeus B M. Binary Alloy Phase Diagrams[M]. Ohio: American Society for Metals, 1987.
  • 9Eliezer D, Aghion E, Froes F H. Advanced Performance Materials[J], 1998, 5:201.
  • 10刘正,王越,王中光,李锋,申志勇.镁基轻质材料的研究与应用[J].材料研究学报,2000,14(5):449-456. 被引量:176

二级参考文献74

  • 1李毅,刘慧英.易形成非晶态的镁基合金Mg-Ni-Nd研究[J].华中理工大学学报,1995,23(12):65-71. 被引量:2
  • 2Akamatsu H, Fujinami T, Horita Z,. Langdon T G, Influence of rolling on the superplastic behavior of an Al-Mg-Sc alloy after ECAP[J]. Scripta Mater., 2001, 44:759-764.
  • 3Komura S, Furukawa M, Horita Z, Nemoto M, et al. Optimizing the procedure of Equal-channel angular pressing for maximum superplasticity [J]. Mater. Sci. Eng., 2001, A297:111-118.
  • 4Stowell M J, Hamilton N E. Superplastic forming of structural alloys[J]. TMS, 321-336.
  • 5Segal V M. Materials processing by simple shear [J). Mater.Sci. Eng., 1995, A197:157.
  • 6Musin F, Kaibyshev R, Motohashi Y, et al. High Strain Rate Superplasticity in an Al-Li-Mg alloy subjected to Equal-Channel angular extrusion [J]. Mater. Trans. JIM, 2002, 43:2370-2377.
  • 7Edington J W, Melton K N, Cutler C P[J]. Superplasticity.Prog. Mater. Sci., 1976, 21:63-170.
  • 8Akihiro Yamashita, Zenji Horita, Langdon Terence G. Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation [J]. Mater. Sci. Eng., 2001,A300 : 142.
  • 9Armstrong R,Codd I,Douthwaite R M,et al.The plastic deformation of polycrystalline aggregates[J].Phil.Mag,1962,7:45.
  • 10Nussbaum G, Sainfort P, et al. Strengthening mechanism in the rapidly solidified AZ91 magnesium alloy [J}. Scripta Metall.,1989, 23:1079.

共引文献206

同被引文献24

引证文献2

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部