通过改变等温变形工艺参数探讨了焊缝显微组织的变化机理与焊件的室温拉伸性能.结果表明:在较低应变速率下,以较大变形量变形时,焊接界面晶粒细化与位错切过晶界和晶内的O/α2相条及O/α2发生拉长、颈缩而断开的机制有关,变形量小时则主要以位错切断晶界及晶内O/α2条为主.应变速率低(10(-4)S-(1))和高(10(-2)S(-1))时,出现的粗细不同条状.O/α2相是与动态再结晶的响应速率有关.在980℃,以10(-2)～10(-4)s(-1)应变速率和30%～50%变形Ti2AlNb/TC11双合金焊接接头,可得到高于TC11合金的室温强度.
参考文献
| [1] | James C W;Edgar A S .[J].Acta Materialia,2003,51:5775. |
| [2] | Nandy T K;Banerjee D .[J].Intermetallics,2000,8:1269. |
| [3] | Sun Z;Karppi R .[J].Journal of Materials Processing Technology,1996,59:257. |
| [4] | Threadgill PL. .THE PROSPECTS FOR JOINING TITANIUM ALUMINIDES[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(0):640-646. |
| [5] | Zhang Hongtao;He Peng;Feng Jicai et al.[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,425(1-2):255. |
| [6] | Liu Y Y;Yao Z K;Guo H Z et al.[J].International Journal of Minerals, Metallurgy and Materials,2009,16:568. |
| [7] | 姚泽坤,张梅琳,梁新民,郭鸿镇.热力耦合作用对TAC-1B和TC11合金焊接界面硬度和显微组织的影响[J].焊接学报,2004(02):125-128. |
| [8] | Tan L J;Yao Z K;Qin C et al.[J].Current Advancements in Molecular Medicines,3895:97-101. |
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：
-
10%
-
20%
-
30%
-
40%
-
50%