欢迎登录材料期刊网

材料期刊网

高级检索

利用Gleeble 1500热/力模拟机对Ti14合金进行了半固态压缩变形试验,研究了该合金在应变速率为5×10-2 s-1和5×10-1 s-1,变形温度为1273~1423 K条件下的流变应力变化规律,分析了该合金半固态下应力松弛发生的条件和原因,并讨论了温度、应变速率和变形机制之间的耦合关系.结果表明:温度和应变速率对流变应力有显著的影响,流变应力随着变形温度的升高和应变速率的降低而降低,宏观应力松弛发生在固相含量区间为0.95~0.98,主要是因为液相的增加减少了晶粒间的“固相桥”作用.由于液相在变形中的渗漏,Ti14合金在1273~1423 K半固态变形的应变速率试验值远远小于Iwasaki润滑流动机制(固液混合变形机制)所需的理论值,说明在所测试的半固态区间内合金仍以固相粒子变形为主,固液混合变形为协调机制.

参考文献

[1] Flemings M C .[J].Metallurgical and Materials Transactions,1991,22B:269.
[2] Eskin D G;Suytino;Katgerman L .[J].Progress in Materials Science,2004,49:629.
[3] Phillion A B;Thompson S;Cockcroft S L et al.[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2008,497:388.
[4] Puttgen W;Hallstedt B;Bleck W et al.[J].Acta Materialia,2007,55:6553.
[5] Zhao Y Q;Wu W L;Ma X D .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,373:315.
[6] Chen Y N;Wei J F;Zhao Y Q .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2009,520:16.
[7] Chen Y N;Wei J F;Zhao Y Q.[J].Materials Science Forum,2009:287.
[8] 赵永庆;朱康英 .[P].China Patent(中国专利).ZL02101190.7,2002.
[9] Martin J L;Wilshire B;Evans R W.Creep Behaviour of Crystalline Solids[M].UK:Pineridge Press,1985
[10] Phillion A B;Cockcroft S L;Lee P D .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2008,491:237.
[11] Colley L J;Wells M A;Maijer D M .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,386:140.
[12] Phillion A B;Coekcroft S L;Lee P D .[J].Scripta Materialia,2009,55:489.
[13] Suytino;Eskin D G;Katgerman L .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,420:1.
[14] Grand Filed;Wang L .[J].Light Mater,2004,420:1.
[15] Chen C P;Tsao A .[J].Acta Materialia,1996,45:1955.
[16] Chino Y;Kobata M;Iwasaki H .[J].Acta Materialia,2003,51:3309.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%