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| 1 | 直接挤压ZM21镁合金的组织细化和力学性能(英文)显示文摘对铸态ZM21镁合金在不同温度(200,250,300和350℃)与不同挤压比(4:1,9:1,16:1)下进行挤压。借助光学显微镜、X射线衍射仪(XRD)和拉伸试验来研究挤压参数(温度和挤压比)的影响。挤压钛合金的光学显微组织呈现出不同阶段的再结晶组织,从部分到完全再结晶,进而影响到合金的力学性能。较高的挤压温度会导致生成粗大的晶粒,然而,较高的挤压比导致细小的晶粒。在250℃、挤压比9:1下挤压后,合金的极限拉伸强度从160MPa增加到316MPa。 | M.THIRUMURUGAN G.M.THIRUGNASAMBANDAM S.KUMARAN T.SRINIVASA RAO | 2011 | Transactions of Nonferrous Metals Society of China2011，21，10： | 5 |
| 2 | AZ91镁合金的挤压和析出硬化行为(英文)显示文摘挤压比为4:1,将铸态AZ91镁合金分别在250,300和350℃下进行挤压,随后进行析出硬化处理(T6)。经过热挤压和析出硬化处理后,铸态AZ91镁合金中粗大的和偏析Mg17Al12析出相被细化并均匀分布在α-镁基体中。在不同的挤压温度下合金中发生了部分或全部动态再结晶。经挤压后,该合金的极限抗拉强度从铸态的190MPa增加到570MPa。AZ91镁合金的时效硬化特征与晶粒尺寸有关。在250、300和350℃下以4:1的挤压比挤压该合金后,获得峰值硬度的时效时间分别为35、30和20h。SEM观察到在AZ91基体中存在均匀细小的Mg17Al12析出相。 | M.THIRUMURUGAN S.KUMARAN | 2013 | 中国有色金属学会会刊:英文版2013，23，6： | 5 |
| 3 | Influence of thermomechanical processing on microstructure,mechanical and strain hardening properties of single-phase Mg-4Li-0.5Ca alloy for structural application显示文摘The single-phase Mg-4Li-0.5Ca alloy was rolled at three different temperatures(250,300 and 350℃)and followed by annealing at 200°C for 10 min.To evaluate the mechanical properties,the tensile test was conducted at a constant strain rate of 10^(-3)s^(-1).Factors influencing the tensile strength and strain hardening properties were assessed by microscopy,XRD and EBSD analysis.Besides,Kocks-Mecking plots(K-M)were used to determine the different stages of strain hardening exhibited by the variously processed Mg-4Li-0.5Ca alloy test specimens.The ultimate tensile strength has decreased as hot-rolling temperature in creases with increased ductility.The strain hardening properties such as hardening capacity(Hc),strain hardening exponent(n)are increased significantly with an increase in hot rolling temperature and subsequent annealing. | N.Sriraman S.Kumaran Sathiya Narayanan N | 2020 | Journal of Magnesium and Alloys2020，8，4： | 2 |
| 4 | Improved strength and ductility of high alloy containing Al–12Zn–3Mg–2.5Cu alloy by combining non-isothermal step rolling and cold rolling显示文摘Al–12Zn–3Mg–2.5Cu alloy was prepared using a liquid metallurgy route under the optimized conditions. A sample cut from the ingot was rolled non-isothermally from 400°C to 100°C in 100°C steps,with 15% reduction in thickness; it was then cold rolled isothermally at room temperature for 85% reduction. The cold-rolled alloys were characterized by electron microscopy,hardness test,and tensile test to elucidate their structural evolution and evaluate their mechanical behavior. In the results,the cast alloy consists of α-aluminum and various intermetallic compounds. These compounds are segregated along the grain boundaries,which makes the alloy difficult to roll at room temperature. The combined effect of non-isothermal step rolling and cold rolling results in the nano/microsized compounds distributed uniformly in the matrix. The hardness is substantially increased after rolling. This increase in hardness is attributed to the ultra-fine grain size,fine-scale intermetallic compounds,and structural defects(e.g.,dislocations,stacking faults,and sub-grains). The ultimate tensile strength of the rolled alloy is approximately 628 MPa with 7% ductility. | V.V.Ravikumar S.Kumaran | 2017 | International Journal of Minerals,Metallurgy and Materials2017，24，2： | 1 |
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