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at temperature range of 940-980 ℃ and initiate strain rate range of 8.33×10-4-1×10-2 s-1. The results show that the alloy exhibits good superplasticity. The maximum tensile elongation can reach up 400% at the temperature of 960 ℃ and the initiate strain rate of 1.67×10-3 s-1. Some complex parts will be formed by superplastic forming technology. Key words: Ti2AlNb alloy; superplasticity......
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. The important conclusions mainly include the superplasticity and its mechanisms of the NiAl alloys, BDT and its mechanisms of the NiAl alloys, nanocrystalline NiAl and its nanocomposites, in-situ particle-reinforced composites and mechanisms of strengthening and toughening, effect of alloying element and development of the JJ-3 alloy. Key word: NiAl alloys; superplasticity; BDT; nanocrystalline......
). The results show that the fine-grained Ti-55 sheet, with an average grain size about 4 μm, exhibits excellent superplasticity. On the optimal superplastic condition of 900 ℃ and initial strain rate... would be significantly reduced at strain rates higher or lower than the optimum strain rate. The temperature for the best superplasticity of Ti-55 sheet moves to higher temperatures at high strain......
径小于10 μm. 关键词:Al-Mg合金；超塑性；再结晶 中图分类号:TG111.7；TG146.2+1；TG316 文献标识码:A 文章编号:1672-7207(2007)04-0608-04 Superplasticity of Al-Mg aluminum alloys...; superplasticity; recrystallization 金属超塑性现象自被发现以来[1],超塑性研究已经成为材料科学的一个重要研究方向[2-5].一般认为,材料在一定......
diffusion and lattice diffusion. Skipping rapid recrystallization annealing can supply a higher value of elongation-to-failure. Key words: superplasticity; aluminum-lithium alloy; activation energy... [8-10] and welding [11-12]. The investigations [13-16] about superplasticity of some WeldaliteTM 049 Al-Li alloys which are same series of AA2195 have been also reported, but almost none of AA2195......
-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Key words: 1420 Al-Li alloy; superplasticity; microstructure; texture; dislocationsuperplasticity by dynamic recrystallization is reported to be quite different from the GBS. Although a number of literatures......
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ductility is dominated by solute drag dislocation creep, and the major failure mechanism is cavity growth and interlinkage. Key words: AZ31 Mg alloy; solute-drag creep; tensile ductility; superplasticity... slip system on prism plane[3]; 2) grain refinement by dynamic recrystallization[4-5]; 3) fine-grained superplasticity (n=2)[6-7]; and 4) dislocation creep (n=3-8)[8-11]. SOMEKAWA et al[9] show......
