杨凯文
,
程兴旺
,
郑超
,
彭美旗
,
靳丹
稀有金属材料与工程
采用分离式霍普金森压杆和终点弹道实验装置,研究了α-β区和β区锻造的TC21钛合金的动态力学性能和抗弹性能.结果表明:在动态压缩试验条件下,α+β区锻造的TC21钛合金较之β区锻造的TC21钛合金具有更高的动态强度,而β区锻造的TC21钛合金的临界断裂应变更大,具有更好的动态塑性变形能力;在12.7 mm穿甲弹侵彻条件下,无论是α+β印区还是β区锻造的TC21钛合金靶板的抗弹性能均与TC4钛合金靶板的抗弹性能相近,这可能是由于TC21钛合金和TC4钛合金靶板都易于发生绝热剪切破坏所导致.α+β区锻造的双态组织靶板的损伤模式为塑性扩孔导致的背部崩落破坏模式,β区锻造的片层组织靶板的损伤模式为脆性破碎模式;2种组织靶板的失效破坏均为绝热剪切带和其诱发的裂纹所导致.
关键词:
TC21钛合金
,
热加工工艺
,
动态力学性能
,
抗弹性能
M.C. Somani
,
L.P. Karjalainen
金属学报(英文版)
Systematic physical simulation of thermo-mechanical processing routes has been applied on a Gleeble 1500 simulator to four copper alloys (mass %) Cu-0.57Co-0.32Si,
Cu-0.55Cr-0.065P, Cu-0.22Zr-0.035Si and Cu-1.01Ni-0.43Si aimed at clarifying the
influences of processing conditions on their final properties, strength and electrical
conductivity. Flow curves were determined over wide temperature and strain rate
ranges. Hardness was used as a measure of the strength level achieved. High hardness was obtained as using equal amounts (strains 0.5) of cold deformation before
and after the precipitation annealing stage. The maximum values achieved for the
Cu-Co-Si, Cu-Cr-P, Cu-Zr-Si and Cu-Ni-Si alloys were 190, 165, 178 and 193 HV5,
respectively. A thermo-mechanical schedule involving the hot deformation-ageing-cold
deformation stages showed even better results for the Cu-Zr-Si alloy. Consequently,
the processing routes were designed based on simulation test results and wires of 5 and
2mm in diameters have been successfully processed in the industrial scale.
关键词:
copper alloys
,
null
,
null
