Tensile tests were then carried out to verify the grain refinement strengthening mechanism. The results show that the mechanical properties in materials that possess UFGs reached a tensile strength of ~1090 MPa, a yield strength of ~530 MPa and an elongation rate of ~47%, which is much better...
bGrain size Grain refinement by heat treatment and by mechanical work is one of the most important strengthening methods for steel. This is because the yield stress of thepolycrystal(σo) has been shown to be inversely proportional to the square root ofgrain diameter(d) as follows: ...
[translate] agrain refinement strengthening and dislocation strengthening. Therefore the high hardness observed [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 葡萄牙语翻译 意大利语翻译 荷兰语翻译 瑞典语翻译 希腊语翻译 51La ...
The grain refinement and strengthening of an austenitic stainless steel are studied under multiple multidirectional forging at 1073?K up to strains of 4. The structural changes are characterized by the development of discontinuous and continuous dynamic recrystallization (DRX) leading to the grain ...
The effects of different initial condition (as-cast, homogenized) on grain refinement strengthening of AZ31B magnesium alloy were investigated by optical microscopy and tensile testing. The results show that the inhomogeneous second-phaseγ-Mgl7Al12along the grain boundary in as-cast was still ...
The grain refinement during cold rolling led to substantial strengthening, which could be expressed by a summation of the austenite and martensite strengthening contributions.doi:10.1080/14786435.2018.1546961Marina OdnobokovaAndrey BelyakovRustam Kaibyshev...
Grain refinement strengtheningHall-Petch coefficientPhosphorusCarbonGrain boundary segregationIn IF steel without interstitials, the Hall-Petch coefficient (ky) is... M Fujihara,N Nakada,T Tsuchiyama,... - 《Materials Science Forum》 被引量: 34发表: 2010年 First-principles study of carbon effects in...
Thus, grain refinement provides an important means to improve strength, ductility, and toughness. Many other strengthening mechanisms are achieved at the expense of ductility and toughness. For many materials, the yield strength σ varies with grain size according to ...
Strengthening of Fe-Mn-Si Based Shape Memory Alloys by Grain Size Refinement (Tokyo Inst. of Technol., Yokohama, 2000). 9. Li, Y., Xin, Y., Jiang, C. & Xu, H. Shape memory effect of grain refined Ni54Mn25Ga21 alloy with high transformation temperature. Scr. Mater. 51, 849–852...
Grain refinement is a result of two separate processes: nucleation of new crystals from liquid aluminum, followed by growth with limited size. These two processes require a driving force which must be provided to the system through undercooling and supersaturation relative to the equilibrium conditions...