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| 1 | Severe plastic deformation (SPD) of biodegradable magnesium alloys and composites: A review of developments and prospects显示文摘The use of magnesium in orthopedic and cardiovascular applications has been widely attracted by diminishing the risk of abnormal interaction of the implant with the body tissue and eliminating the second surgery to remove it from the body.Nevertheless,the fast degradation rate and generally inhomogeneous corrosion subsequently caused a decline in the mechanical strength of Mg during the healing period.Numerous researches have been conducted on the influences of various severe plastic deformation(SPD)processes on magnesium bioalloys and biocomposites.This paper strives to summarize the various SPD techniques used to achieve magnesium with an ultrafine-grained(UFG)structure.Moreover,the effects of various severe plastic deformation methods on magnesium microstructure,mechanical properties,and corrosion behavior have been discussed.Overall,this review intends to clarify the different potentials of applying SPD processes to the magnesium alloys and composites to augment their usage in biomedical applications. | M.Kasaeian-Naeini M.Sedighi R.Hashemi | 2022 | Journal of Magnesium and Alloys2022，10，4： | 6 |
| 2 | PTCAP工艺生产的Al 5083薄壁管吸能能力的实验验证和数值计算显示文摘对平行管角挤压(PTCAP)工艺生产的Al5083薄壁管的吸能能力进行评价。研究沿周向和轴向方向的显微结构、力学性能和各向异性系数。结果表明:能量吸收值随加工道次的增加而降低,未处理、第一道次和第二道次处理的样品的能量吸收值分别为167、161.4和160.7J。能量吸收值的数值模拟结果与未处理的、第一和第二道次PTCAP处理后样品之间的误差分别约为5%、10%和13%。吸能能力与各向异性系数和显微结构有关。结果表明,经过一道次和二道次PTCAP处理后,晶粒得到细化,极限抗拉强度和显微硬度均得到提高,但一道次处理后的提高幅度更大。此外,通过PTCAP处理,变形模式发生改变,退火后样品的变形模式非常对称且呈圆形,而第一和第二道次变形样品的变形模式为三叶和双叶钻石形状。退火管和PTCAP处理管变形模式的数值模拟结果与实验结果一致。总之,薄壁管的变形模式取决于其力学性能和PTCAP过程中力学性能的变化。 | A.HOSSEINI D.RAHMATABADI R.HASHEMI H.AKBARI | 2020 | Transactions of Nonferrous Metals Society of China2020，30，5： | 3 |
| 3 | 应变路径对AA1050铝板力学性能、成形极限曲线及织构演化影响的实验研究显示文摘实验研究了应变路径变化对AA1050铝合金力学性能、成形性能和成形极限的影响。讨论了以单向、反向和交叉轧制的三种不同方式的应变路径。对比了三种轧制方式在20%和40%轧制比下的晶粒尺寸、硬度、应力-应变曲线和成形极限。结果表明,交叉轧制试样的晶粒尺寸小于其他方式轧制试样的晶粒尺寸;单向和交叉轧制试样的强度和伸长率均高于反向轧制方式的,单向和交叉轧制试样的硬度等于或大于反向轧制试样的;此外,交叉轧制使试样的各向异性减小,R趋近于1。试样的成形极限在交叉轧制方式下明显提高,在40%轧制比下,交叉轧制的FLC_(0)为0.113,单向轧制的FLC_(0)为0.09,反向轧制的FLC_(0)为0.081。单向和反向轧制的成形极限与加载路径的相关。 | A.ROUZBEH S.M.ATIFEH M.SEDIGHI R.HASHEMI | 2023 | Journal of Central South University2023，30，8： | 0 |
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