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| 1 | Establishing empirical relationships to predict grain size and tensile strength of friction stir welded AA 6061-T6 aluminium alloy joints显示文摘AA 6061-T6 aluminium alloy(Al-Mg-Si alloy) has gathered wide acceptance in the fabrication of light weight structures requiring a high specific strength and good corrosion resistance.Compared with the fusion welding processes that are routinely used for joining structural aluminium alloys,friction stir welding(FSW) process is an emerging solid state joining process in which the material welded does not melt and recast.Joint strength is influenced by the grain size and tensile strength of the weld nugget region.Hence,an attempt was made to develop empirical relationships to predict grain size and tensile strength of friction stir welded AA 6061-T6 aluminium alloy joints.The empirical relationships are developed by response surface methodology(RSM) incorporating FSW tool and process parameters.A linear regression relationship was also established between grain size and tensile strength of the weld nugget of FSW joints. | S.RAJAKUMAR C.MURALIDHA RAN V.BALASUBRAMANIAN | 2010 | Transactions of Nonferrous Metals Society of China2010，20，10： | 18 |
| 2 | 焊接方法对AA2219铝合金接头性能的影响(英文)显示文摘使用钨电极惰性气体保护焊接、电子束焊接和搅拌摩擦焊接技术制备无填充金属的AA2219铝合金对焊接头。研究三种焊接工艺对材料拉伸、疲劳和腐蚀行为的影响。使用光学和电子显微镜研究显微结构。结果表明,与钨电极惰性气体保护焊和电子束焊接相比,搅拌摩擦焊制备的接头具有较高的拉伸和疲劳性能与较低的耐蚀性能,这主要是由于其中的细化晶粒和均匀分布的强化析出相所引起的。 | S.MALARVIZHI V.BALASUBRAMANIAN | 2011 | Transactions of Nonferrous Metals Society of China2011，21，5： | 15 |
| 3 | Influences of atmospheric plasma spraying parameters on the porosity level of alumina coating on AZ31B magnesium alloy using response surface methodology | D.Thirumalaikumarasamy K.Shanmugam V.Balasubramanian | 2012 | Progress in Natural Science:Materials International2012，22，5： | 13 |
| 4 | Effect of post weld heat treatment on tensile properties and microstructure characteristics of friction stir welded armour grade AA7075-T651aluminium alloy显示文摘This paper reports the effects of post weld heat treatments, namely artificial ageing and solution treatment followed by artificial ageing, on microstructure and mechanical properties of 12 mm thick friction stir welded joints of precipitation hardenable high strength armour grade AA7075-T651 aluminium alloy. The tensile properties, such as yield strength, tensile strength, elongation and notch tensile strength, are evaluated and correlated with the microhardness and microstructural features. The scanning electron microscope is used to characterie the fracture surfaces. The solution treatment followed by ageing heat treatment cycle is found to be marginally beneficial in improving the tensile properties of friction stir welds of AA7075-T651 aluminium alloy. | P.SIVARAJ D.KANAGARAJAN V.BALASUBRAMANIAN | 2014 | Defence Technology(防务技术)2014，10，1： | 12 |
| 5 | Effect of tool pin profile on microstructure and tensile properties of friction stir welded dissimilar AA 6061e AA 5086 aluminium alloy joints显示文摘Joints between two different grades of aluminium alloys are need of the hour in many light weight military structures.In this investigation,an attempt has been made to join the heat treatable(AA 6061) and non-heat treatable(AA 5086) aluminium alloys by friction stir welding(FSW)process using three different tool pin profiles like straight cylindrical,taper cylindrical and threaded cylindrical.The microstructures of various regions were observed and analyzed by means of optical and scanning electron microscope.The tensile properties and microhardness were evaluated for the welded joint.From this investigation it is founded that the use of threaded pin profile of tool contributes to better flow of materials between two alloys and the generation of defect free stir zone.It also resulted in higher hardness values of 83 HV in the stir zone and higher tensile strength of 169 MPa compared to other two profiles.The increase in hardness is attributed to the formation of fine grains and intermetallics in the stir zone,and in addition,the reduced size of weaker regions,such as TMAZ and HAZ regions,results in higher tensile properties. | M.ILANGOVAN S.RAJENDRA BOOPATHY V.BALASUBRAMANIAN | 2015 | Defence Technology(防务技术)2015，11，2： | 12 |
| 6 | Comparison of the corrosion behaviour of AZ31B magnesium alloy under immersion test and potentiodynamic polarization test in NaCl solution显示文摘This paper reports the comparative evaluation of the corrosion behaviour of AZ31B magnesium alloy under immersion and potentiodynamic polarization test in NaCl solution at different chloride ion concentrations,pH value and exposure time.The specimens were exposed to immersion and polarization environments in order to evaluate their corrosion rates.Empirical relationship was established to predict the corrosion rate of AZ31B magnesium alloy.Three factors,five level,central composite rotatable design matrix was used to minimize the number of experimental conditions.Response surface methodology was used to develop the relationship.The developed relationship can be effectively used to predict the corrosion rate of AZ31B magnesium alloy at 95%confidence level for both the testing.This research work proves a better corrosion resistance of AZ31B magnesium alloy at the alkaline solution than the acidic and the neutral solutions,moreover,low corrosion rate was found at low concentrated solution and higher exposure time respectively. | D.Thirumalaikumarasamy K.Shanmugam V.Balasubramanian | 2014 | Journal of Magnesium and Alloys2014，2，1： | 10 |
| 7 | Identifying the optimal HVOF spray parameters to attain minimum porosity and maximum hardness in iron based amorphous metallic coatings显示文摘Flow based Erosion e corrosion problems are very common in fluid handling equipments such as propellers, impellers, pumps in warships, submarine. Though there are many coating materials available to combat erosionecorrosion damage in the above components, iron based amorphous coatings are considered to be more effective to combat erosionecorrosion problems. High velocity oxy-fuel(HVOF)spray process is considered to be a better process to coat the iron based amorphous powders. In this investigation, iron based amorphous metallic coating was developed on 316 stainless steel substrate using HVOF spray technique. Empirical relationships were developed to predict the porosity and micro hardness of iron based amorphous coating incorporating HVOF spray parameters such as oxygen flow rate, fuel flow rate, powder feed rate, carrier gas flow rate, and spray distance. Response surface methodology(RSM) was used to identify the optimal HVOF spray parameters to attain coating with minimum porosity and maximum hardness. | S.Vignesh K.Shanmugam V.Balasubramanian K.Sridhar | 2017 | Defence Technology(防务技术)2017，13，2： | 9 |
| 8 | Optimizing pulsed current gas tungsten arc welding parameters of AA6061 aluminium alloy using Hooke and Jeeves algorithm显示文摘Though the preferred welding process to weld aluminium alloy is frequently constant current gas tungsten arc welding (CCGTAW),it resulted in grain coarsening at the fusion zone and heat affected zone(HAZ).Hence,pulsed current gas tungsten arc welding(PCGTAW) was performed,to yield finer fusion zone grains,which leads to higher strength of AA6061 (Al-Mg-Si) aluminium alloy joints.In order to determine the most influential control factors which will yield minimum fusion zone grain size and maximum tensile strength of the joints,the traditional Hooke and Jeeves pattern search method was used.The experiments were carried out based on central composite design with 31 runs and an algorithm was developed to optimize the fusion zone grain size and the tensile strength of pulsed current gas tungsten arc welded AA6061 aluminium alloy joints.The results indicate that the peak current (Ip) and base current (IB) are the most significant parameters,to decide the fusion zone grain size and the tensile strength of the AA6061 aluminum alloy joints. | S.BABU T.SENTHIL KUMAR V.BALASUBRAMANIAN | 2008 | 中国有色金属学会会刊:英文版2008，18，5： | 8 |
| 9 | Experimental and numerical investigation on under-water friction stir welding of armour grade AA2519-T87 aluminium alloy显示文摘Friction stir welding(FSW) is a promising welding process that can join age hardenable aluminium alloys with high joint efficiency. However,the thermal cycles experienced by the material to be joined during FSW resulted in the deterioration of mechanical properties due to the coarsening and dissolution of strengthening precipitates in the thermo-mechanical affected zone(TMAZ) and heat affected zone(HAZ). Under water friction stir welding(UWFSW) is a variant of FSW process which can maintain low heat input as well as constant heat input along the weld line. The heat conduction and dissipation during UWFSW controls the width of TMAZ and HAZ and also improves the joint properties. In this investigation, an attempt has been made to evaluate the mechanical properties and microstructural characteristics of AA2519-T87 aluminium alloy joints made by FSW and UWFSW processes. Finite element analysis has been used to estimate the temperature distribution and width of TMAZ region in both the joints and the results have been compared with experimental results and subsequently correlated with mechanical properties.? 2016 China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved. | S.SREE SABARI S.MALARVIZHI V.BALASUBRAMANIAN G.MADUSUDHAN REDDY | 2016 | Defence Technology(防务技术)2016，12，4： | 7 |
| 10 | 搅拌摩擦焊接AA6061-AZ31B合金异质接头在搅拌区的电化学腐蚀行为(英文)显示文摘异质金属的连接在交通运输领域如燃料消耗降低、材料质量减轻、排放量减少等方面具有较多优越性。然而,采用熔焊工艺对铝、镁合金进行焊接是一个非常复杂的过程。搅拌摩擦焊接方法是一种对铝、镁合金进行连接的有效方法。在搅拌摩擦焊接过程中,铝、镁合金在搅拌区混合,致使合金在该区的耐蚀性能变差。本文作者研究搅拌摩擦焊AA6061-AZ31B合金异质接头的耐蚀性能,通过改变氯离子浓度、Na Cl溶液的p H值和焊接时间对样品进行恒电位极化实验。采用光学显微镜、扫描电镜和X射线衍射技术对样品的腐蚀表面进行表征。结果表明,在所研究的3个参数中,焊接时间对搅拌摩擦焊AA6061-AZ31B合金异质接头耐蚀性能的影响最显著。 | R.KAMAL JAYARAJ S.MALARVIZHI V.BALASUBRAMANIAN | 2017 | Transactions of Nonferrous Metals Society of China2017，27，10： | 7 |
| 11 | 轴向力对搅拌摩擦焊接AZ61A镁合金拉伸性能的影响(英文)显示文摘研究轴向力对搅拌摩擦焊接AZ61A镁合金拉伸性能的影响。在3~7kN范围内选择5个不同大小的轴向力制备接头。测试接头的拉伸性能,并研究其与搅拌区显微组织和硬度的相关性。结果表明,与其他轴向力下的接头相比,轴向力为5kN时制备的接头具有最好的拉伸性能。搅拌区生成的细晶组织和高硬度是获得高拉伸强度的主要原因。 | A.RAZAL ROSE K.MANISEKAR V.BALASUBRAMANIAN | 2011 | Transactions of Nonferrous Metals Society of China2011，21，5： | 7 |
| 12 | 铝合金和不锈钢摩擦焊接参数的预测和优化(英文)显示文摘搅拌摩擦焊是一种固态连接工艺,具有低的热量输入、高的生产效率、容易操作和环境友好等优点而被广泛使用。搅拌摩擦焊能够焊接不同类型的黑色金属和有色金属,而传统的熔焊则不能。焊接工艺参数如摩擦压力、顶锻压力、摩擦时间和施压时间对接头的强度起主要作用。本研究旨在建立一个经验方程去预测搅拌摩擦焊AA6082和AISI304不锈钢接头的拉伸强度。采用响应面法去优化搅拌摩擦焊工艺参数,从而得到接头的最大拉伸强度。 | R.PAVENTHAN P.R.LAKSHMINARAYANAN V.BALASUBRAMANIAN | 2011 | Transactions of Nonferrous Metals Society of China2011，21，7： | 7 |
| 13 | 摩擦搅拌焊AA2024铝合金在盐雾条件下的腐蚀性能(英文)显示文摘2024铝合金是一种重要的工程材料,被大量应用于航空工业。但是在含氯介质中,2024铝合金易于腐蚀。本研究对5 mm厚AA2024铝合金轧板进行摩擦搅拌焊接。通过Na Cl溶液盐雾腐蚀试验对试样在不同p H值、氯离子浓度和喷雾时间条件下的腐蚀性能进行评价。建立一个经验关系式对摩擦搅拌焊AA2024铝合金的腐蚀速率进行预测。采用含有3因素5水平的中心复合旋转设计以减少实验次数。采用响应曲面法研究实验参数间的关联关系。在中性p H条件下,腐蚀速率降低;而在碱性和酸性条件下,腐蚀速率增加。随着喷雾时间的增加,腐蚀速率降低,但腐蚀趋于均匀,而随着氯离子浓度的增加,腐蚀速率增加。 | R.SEETHARAMAN V.RAVISANKAR V.BALASUBRAMANIAN | 2015 | Transactions of Nonferrous Metals Society of China2015，25，5： | 7 |
| 14 | 脉冲电流对气体保护焊铝合金焊接接头的温度、焊缝和性能的影响(英文)显示文摘比较了在恒电流和脉冲电流条件下,气体保护焊铝合金接头的温度分布和焊缝外形,研究了脉冲电流对铝合金接头的拉伸性能、硬度分布、微观组织特征和残余应力分布的影响。与恒电流焊接相比,由于在熔池发生了晶粒细化,使用脉冲电流焊接可以提高焊缝的拉伸性能。 | N.KARUNAKARAN V.BALASUBRAMANIAN | 2011 | Transactions of Nonferrous Metals Society of China2011，21，2： | 6 |
| 15 | Cold Cracking of Flux Cored Arc Welded Armour Grade High Strength Steel Weldments显示文摘In this investigation,an attempt has been made to study the influence of welding consumables on the factors that influence cold cracking of armour grade quenched and tempered(Q&T) steel welds.Flux cored arc welding(FCAW) process were used making welds using austenitic stainless steel(ASS) and low hydrogen ferritic steel(LHF) consumables.The diffusible hydrogen levels in the weld metal of the ASS and LHF consumables were determined by mercury method.Residual stresses were evaluated using X-ray stress analyzer and implant test was carried out to study the cold cracking of the welds.Results indicate that ASS welds offer a greater resistance to cold cracking of armour grade Q&T steel welds. | G.Magudeeswaran V.Balasubramanian G.Madhusudhan Reddy | 2009 | Journal of Materials Science & Technology2009，25，4： | 6 |
| 16 | AZ31B镁合金的脉冲电流气体保护钨极焊过程参数优化(英文)显示文摘建立预测脉冲电流气体保护钨极焊AZ31B镁合金接头的拉伸强度经验方程。研究焊接过程参数如峰值电流、基础电流、脉冲频率和脉冲时间对焊接接头的影响。试验设计了一个四因素五水平的正交实验。建立的经验方程能够有效地预测脉冲电流钨电极惰性气体保护焊AZ31B镁合金的焊缝拉伸强度,可信度为95%。结果表明,脉冲频率对拉伸强度的影响最大,其次是峰值电流、脉冲时间和基电流。 | G.PADMANABAN V.BALASUBRAMANIAN | 2011 | Transactions of Nonferrous Metals Society of China2011，21，3： | 6 |
| 17 | Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints显示文摘Naval grade high strength low alloy(HSLA) steels can be easily welded by all types of fusion welding processes. However, fusion welding of these steels leads to the problems such as cold cracking, residual stress, distortion and fatigue damage. These problems can be eliminated by solid state welding process such as friction stir welding(FSW). In this investigation, a comparative evaluation of mechanical(tensile, impact,hardness) properties and microstructural features of shielded metal arc(SMA), gas metal arc(GMA) and friction stir welded(FSW) naval grade HSLA steel joints was carried out. It was found that the use of FSW process eliminated the problems related to fusion welding processes and also resulted in the superior mechanical properties compared to GMA and SMA welded joints. | S.RAGU NATHAN V.BALASUBRAMANIAN S.MALARVIZHI A.G.RAO | 2015 | Defence Technology(防务技术)2015，11，3： | 6 |
| 18 | Process parameters optimization for friction stir welding of RDE-40 aluminium alloy using Taguchi technique显示文摘Taguchi approach was applied to determine the most influential control factors which will yield better tensile strength of the joints of friction stir welded RDE-40 aluminium alloy. In order to evaluate the effect of process parameters such as tool rotational speed, traverse speed and axial force on tensile strength of friction stir welded RDE-40 aluminium alloy, Taguchi parametric design and optimization approach was used. Through the Taguchi parametric design approach, the optimum levels of process parameters were determined. The results indicate that the rotational speed, welding speed and axial force are the significant parameters in deciding the tensile strength of the joint. The predicted optimal value of tensile strength of friction stir welded RDE-40 aluminium alloy is 303 MPa. The results were confirmed by further experiments. | A.K.LAKSHMINARAYANAN V.BALASUBRAMANIAN | 2008 | 中国有色金属学会会刊:英文版2008，18，3： | 6 |
| 19 | 搅拌摩擦焊异种AA6061-AA5086铝合金接头的显微组织与力学性能(英文)显示文摘在熔焊异种可热处理强化和不可热处理强化铝合金过程中,面临许多与凝固相关的问题。采用搅拌摩擦焊接可以解决这些问题,从而可以综合利用两种铝合金的优异性能。研究搅拌摩擦焊同种和异种AA6061和AA5086焊接接头的显微组织和拉伸性能。采用光学显微镜和扫描电子显微镜观察分析不同区域的显微组织,测量焊接接头不同部位的显微硬度,评价焊接接头的拉伸性能,并研究其与显微组织和显微硬度之间的关联。研究发现,异种焊接接头的最大维氏硬度为HV 115,焊接效率为56%。这主要是由于获得无缺陷的搅拌区和晶粒增强作用。 | M.ILANGOVAN S.RAJENDRA BOOPATHY V.BALASUBRAMANIAN | 2015 | Transactions of Nonferrous Metals Society of China2015，25，4： | 6 |
| 20 | Influence of chloride ion concentration on immersion corrosion behaviour of plasma sprayed alumina coatings on AZ31B magnesium alloy显示文摘Corrosion attack of aluminium and magnesium based alloys is a major issue worldwide.The corrosion degradation of an uncoated and atmospheric plasma sprayed alumina(APS)coatings on AZ31B magnesium alloy was investigated using immersion corrosion test in NaCl solutions of different chloride ion concentrations viz.,0.01 M,0.2 M,0.6 M and 1 M.The corroded surface was characterized by an optical microscope and X-ray diffraction.The results showed that the corrosion deterioration of uncoated and coated samples were significantly influenced by chloride ion concentration.The uncoated magnesium and alumina coatings were found to offer a superior corrosion resistance in lower chloride ion concentration NaCl solutions(0.01 M and 0.2 M NaCl).On the other hand the coatings and Mg alloy substrate were found to be highly susceptible to localized damage,and could not provide an effective corrosion protection in solutions containing higher chloride concentrations(0.6 M and 1 M).It was found that the corrosion resistance of the ceramic coatings and base metal gets deteriorated with the increase in the chloride concentrations. | D.Thirumalaikumarasamy K.Shanmugam V.Balasubramanian | 2014 | Journal of Magnesium and Alloys2014，2，4： | 6 |
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