利用电解沉积技术制备出系列亚微米晶纯铜样品, 并在样品中引入不同密度的纳米孪晶．室温轧制具有不同孪晶密度的纯铜样品, 使样品中储存大量位错．结果表明, 具有高密度纳米孪晶结构的纯铜样品, 40%轧制变形可使其屈服强度从690 MPa增加到850 MPa; 而无孪晶的亚微米铜样品的屈服强度在同样轧制变形条件下只从230 MPa增加到330 MPa. 这表明具有高密度纳米孪晶结构的纯铜样品具有很高的位错储存能力.
A series of ultrafine-crystalline (ufc) pure copper samples with different densities of nano-sized twins were synthesized by means of the electro-deposition technique. Numerous dislocations were induced in the pure copper samples by means of cold rolling. After cold rolling to the deformation degree of 40%, the yield strength of ufc copper sample with high density of nano-sized twins increased from 690 MPa to 850 MPa, while the yield strength of ufc copper sample without twins increased from 230 MPa only to 330 MPa. The difference of strength increment suggests that the copper sample with high density of nano-sized twins has high storage capacity of dislocations.
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| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] |
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