Xuesong LIU
,
Hongyuan FANG
,
Shude JI
,
Zhibo DONG
材料科学技术（英文）
The technology of trailing peening is a kind of promisingly bran-new technology which can be used to control welding stress and distortion of Ti alloy thin plate. Control of TC4 Ti alloy thin plate welding stress and distortion under the condition of conventional welding and trailing peening is performed, respectively. The results show that the technology of trailing peening effectively reduces deflection and transverse shrinkage of thin plate weldment. The maximum deflection is decreased from 15 mm under the condition of conventional welding to 5 mm, while the weld transverse shrinkage is decreased from 0.5 mm to about 0.1 mm.
关键词:
Control of residual stress and distortion
,
null
,
null
Physical Review B
In a recent publication [S. Dong et al., Phys. Rev. Lett. 103, 127201 (2009)], two (related) mechanisms were proposed to understand the intrinsic exchange bias present in oxides heterostructures involving G-type antiferromagnetic perovskites. The first mechanism is driven by the Dzyaloshinskii-Moriya interaction, which is a spin-orbit coupling effect. The second is induced by the ferroelectric polarization, and it is only active in heterostructures involving multiferroics. Using the SrRuO(3)/SrMnO(3) superlattice as a model system, density-functional calculations are here performed to verify the two proposals. This proof-of-principle calculation provides convincing evidence that qualitatively supports both proposals.
关键词:
thin-films;weak ferromagnetism;superlattices;anisotropy;bifeo3;srruo3;model
