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microscopy (SEM). Furthermore, the contributions of grain-size effect, Orowan strengthening and dislocation strengthening to the yield strength of the bulk nanocrystalline Al were quantitatively...%. The enhanced strength of the bulk nanocrystalline Al can be mainly attributed to the grain-size effect and Orowan strengthening. Key words: nanocrystalline; aluminum; cryomilling; microstructure......
strengthening effect, their precipitation sequence and precipitate phases are also very typical in magnesium alloys containing rare earth elements. The research progress on ageing precipitation of Mg-Gd.... At last, the precipitation strengthening mechanism and further development of Mg-Gd alloys were discussed. Key words: Mg-Gd alloys; ageing precipitation kinetics; precipitate; mechanical property......
of the thixoforged composite are ascribed to the elimination of porosities and the work hardening. Key words: thixoforging; semisolid deformation; fracture mechanism; strengthening mechanism 1... these shortcomings of magnesium alloys [1,3,4]. The in-situ synthesis technology produces the desired reinforcements via reaction in molten alloy during traditional cast [5], which is a promising solution......
Industrial Experience with Case Hardening of Stainless Steels by Solution Nitriding Bernd Edenhofer1,Roland Zaugg2,Hans Berns3 (1.IPSEN Industries International GmbH, D-47514 Kleve, Germany;2.H... have been successfully SolNit(R) treated in industry leading to superior properties in respect to hardness/strength and corrosion resistance 关键词:Case hardening; stainless steel; solution nitriding......
Trans. Nonferrous Met. Soc. China 28(2018) 2419-2426 Enhanced strengthening by two-step progressive solution and aging treatment in AM50-4%(Zn,Y) magnesium alloy Shuai DAI, Feng WANG, De-zhi MA, Zhi... with the one-step solution treatment. This resulted in a certain enhancement of the precipitation strengthening effect during the subsequent aging process. The precipitation of the Ф phase had......
J. Cent. South Univ. (2021) 28: 1978-1989 DOI: https://doi.org/10.1007/s11771-021-4746-2 Annealing twin mechanism for 304 stainless steel solution treatment process JI Kai-sheng(纪开盛)1, SONG Guang... and grain orientation variation during the solution heat treatment process of the 304 stainless steel pipe were studied. It was found that after the solution heat treatment, the texture type clearly......
Strengthening of High Strength Rebars张晓刚,姚卫薰摘 要:<正> The influence of alloying elements and coolingconditions after rolling on the microstructures andmechanical properties of a series of medium carbonSi-Mn-Mo-V high-strength precision-formedrebars were investigated.It is found that steel withcombined addition of Mo and V appears to be themost......
mechanisms including grain boundaries strengthening, dispersion strengthening, solid-solution strengthening and dislocation strengthening are the dominant strengthening mechanisms. A calculation shows...,Si的固溶度很难精确确定；第二相颗粒的体积分数和平均尺寸很难精确确定；平均晶粒尺寸也可能存在一定误差. 表3 5083铝合金不同强化机制对强度的贡献和估算的总强度 Table 3 Contribution of different strengthening mechanisms and estimated total strength of 5083Al alloy......
. It is considered that hydrogen solution strengthening and V element diffusion are the main factors causing the hardness of α phase increase with the increase of hydrogen, and the formation of δ hydrides, lattice defects, hydrogen solution strengthening and Al element diffusion jointly cause the hardness of β phase increase with the increasing hydrogen. Key words: Ti6Al4V alloy; hydrogenation......
, which caused lattice distortion and resulted in a solid solution strengthening effect. The results of the present study showed that the solid solution strengthening effect was insufficient to compensate for the weakening of the secondary phases strengthening effect. As a result, the yield strength of the solution-treated alloy decreased dramatically compared with the as-cast alloy. Besides, due......
