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at various aging states and different hydrogen charging current densities were investigated by flowing stress differential method. The results show that the hydrogen-induced additive stress of 7050 aluminum... embrittlement; hydrogen-induced additive stress; aging 7050铝合金具有密度小,强度高,加工性能好及焊接性能优良等特点,是重要的轻质高强结构材料,广泛地应用于航空工业及民用工业等领域[1-4].在相当长的一段时期内,7xxx系高强铝合金的应力腐蚀(SCC)一直被认为是以阳极溶解为主[5-6],20世纪80年代以后,大多数材料工作者认为SCC主要是氢致开裂过......
; 文献标志码:A Effect of stress aging on mechanical properties and microstructures of 2E12 aluminum alloy WANG Hong-wei, YI Dan-qing, CAI Jin-ling, WANG Bin (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: The influences of tensile stress aging on the mechanical properties and microstructure of 2E12 aluminum alloy were......
for stress aging of 2219 aluminum alloy ZHAN Lihua, ZHANG Jiao, JIA Shufeng (State Key Laboratory of High Performance Complex Manufacturing, School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China) Abstract: The comparison experiment of stress relaxation aging and creep aging was carried out under the stress of 120-200 MPa at 175 ℃ aging for 18 h......
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of the applied strain, lattice misfit and the elastic inhomogeneity. Both nucleation and growth are affected by the external stress by two-step aging simulation, but the effect degree depends on lattice misfit. The stress aging technology can be used to obtain superlattice structure for some special systems. Key words: lattice misfit; external stress; stress aging; computer simulation 通过引入外加......
alloys can reach up to 730-740 MPa, and the elongation is about 8%-10% under the condition of two-stage aging treatment. For the stress ratio is 0.1, the maximum stress for 107 cycles is over 400 MPa...-cycle fatigue properties The high-cycle properties of the alloy at the two-stage aging treatment are shown in Table 2. For the stress ratio is 0.1, the maximum stress for 107 cycles is over 400 MPa......
a theoretical and practical approach in anti-stresses and anti-aging. Key words: blood viscosity; carbonyl stress; malondialdehyde; cross linking; decarbonylation effect; glutathione 1 Introduction...J. Cent. South Univ. Technol. (2008) 15(s1): 540-544 DOI: 10.1007/s11771-008-417-9 Influence of carbonyl stress on rheological alterations of blood materials and decarbonylation effect......
J. Cent. South Univ. (2020) 27: 3163-3174 DOI: https://doi.org/10.1007/s11771-020-4538-0 Measuring internal residual stress in Al-Cu alloy forgings by crack compliance method with optimized...-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Measuring the internal stress of Al alloy forgings accurately is critical for controlling the deformation during the subsequent machine......
electron microscopy(TEM). The results show that T74 aging treatment has low sensitivity of stress corrosion cracking and excellent resistance of exfoliation corrosion at the expense of strength compared with T6 aging treatment. RRA treatment remarkably increases stress corrosion cracking resistance and exfoliation corrosion resistance with high strength. The trend of the corrosion properties with aging......
J. Cent. South Univ. Technol. (2008) 15: 289-294 DOI: 10.1007/s11771-008-0054-3 Flow stress behavior of Al-Cu-Li-Zr alloy containing Sc during hot compression deformation LIANG Wen-jie(梁文杰)1, 2...; Abstract: The flow stress behavior of Al-3.5Cu-1.5Li-0.25(Sc+Zr) alloy during hot compression deformation was studied by isothermal......