Studies on weldability of nichrome-laminated powder alloy using TIG welding

Xia, Chengliang; Li, Y.; Wang, J.; Puchkov, U.A.; Yunjian, Jiang

doi:10.4149/km_2010_4_257

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…5, b, c. The above results demonstrate that the distribution and compatibility of the reinforcement element in the different parts of the weld is homogeneous, resulting from the uniform composition in the composite and optimum welding parameters [22,23]. have been observed.…”

Section: Examination Of Microstructurementioning

confidence: 54%

Joinability of Particulate Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

Ateş¹,

Gökmen²,

Çinici³

et al. 2016

Metallofiz. Noveishie Tekhnol.

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In the present study, weldability of Alumix 231 based composite materials reinforced with Al 2 O 3 and B 4 C and produced by powder metallurgy route is investigated. Various amounts of (0, 5, 10, and 15% wt.) Al 2 O 3 and B 4 C powders are added to the pre-alloyed Alumix 231 (Al-2.5% Cu-0.5% Mg-14% Si) powders separately and then mixed in a three-dimensional mixer for 45 min. Powders are compacted and sintered in an argon atmosphere at 640C for 4 h. Produced blocks are welded by the Tungsten Inert Gas (TIG) welding at 25 V, 197 A and 14 l/min shielded gas flow in commercially pure argon atmosphere. Macro-and microexamination together with some mechanical properties of the welded area are studied. The results show that, although high amount of particles resulted in a decrease in the density, these composite materials can still be welded by the TIG welding method successfully.Исследуется свариваемость произведённых методом порошковой метал-лургии композитных материалов на основе Alumix 231, армированных Al 2 O 3 и B 4 C. Различные количества (0, 5, 10 и 15 масс.%) порошков Al 2 O 3 и B 4 C по отдельности добавлялись в предварительно сплавленные порош-ки Alumix 231 (Al-2,5% Cu-0,5% Mg-14% Si), а затем перемешивались в трёхмерном миксере в течение 45 минут. Затем порошки прессовались и спекались в атмосфере аргона при 640C в течение 4 часов. Полученные блоки сваривались вольфрамовой сваркой в атмосфере инертного газа при 25 В, 197 А и потоке инертного газа в 14 л/мин в атмосфере технически чистого аргона. Были проведены макро-и микроисследования некоторых механических свойств сварной зоны. Их результаты показали, что, хотя оказалось большое количество частиц с пониженной плотностью, эти композитные материалы могут быть успешно сварены методом вольфра-мовой сварки в атмосфере инертного газа. 1314 H. ATES, U. GOKMEN, H. CINICI, A. UZUN, H. KARAKOC, and M. TURKER у попередньо стоплені порошки Alumix 231 (Al-2,5% Cu-0,5% Mg-14% Si), а потім перемішувалися в тривимірному міксері впродовж 45 хвилин. Потім порошки пресувалися та спікалися в атмосфері арґону при 640C впродовж 4 годин. Одержані блоки зварювалися вольфрамовим зварен-ням в атмосфері інертного газу при 25 В, 197 А та потоці інертного газу у 14 л/хв. в атмосфері технічно чистого арґону. Було виконано макро-та мікродослідження деяких механічних властивостей зварної зони. Їх ре-зультати показали, що, хоча виявилася велика кількість частинок зі зниженою густиною, ці композитні матеріяли можуть бути успішно зва-рені методою вольфрамового зварювання в атмосфері інертного газу.

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Section: Examination Of Microstructurementioning

confidence: 54%

Joinability of Particulate Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

Ateş¹,

Gökmen²,

Çinici³

et al. 2016

Metallofiz. Noveishie Tekhnol.

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“…Ojo et al examined the fusion zone (FZ) microstructure of Inconel 738 and analyzed the microconstituents and eutectic phases induced by microsegregation [8]. Xia et al studied weldability of nichromelaminated powder alloy to 19%Cr-9%Ni austenitic steel using TIG welding process [3]. However, the literature lacks a study of effects of TIG welding on wrought nichrome.…”

Section: Introductionmentioning

confidence: 99%

Effects of TIG welding process on microstructure, electrical resistance and mechanical properties of Nichrome 8020

Afkhami¹,

HALVAEE²

2021

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This study investigates effects of TIG welding and welding heat input on microstructure, hardness, tensile strength, fracture mechanism, and electrical resistance of Nichrome 8020 to evaluate its efficiency after welding, especially as a heating element. The post-weld microstructure of the alloy remained austenitic. The microstructure of fusion zone consisted of columnar dendrites, equiaxed dendrites, and intermetallic carbonitrides. These precipitates nucleated and grew among subgrain boundaries. Because of grain growth, hardness and tensile strength decreased after welding, and by increasing welding heat input, these mechanical properties decreased more severely. Fractography analysis showed that fracture surfaces of all the welded samples included both brittle and ductile features. Despite grain growth, which occurred as a result of the welding process, the electrical resistance of Nichrome 8020 increased slightly after welding. No signs of welding cracks and topologically close-packed phases were observed in the heat affected zone and fusion zone of any sample.

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“…One of the joining methods, as an industrial technique, is welding. Amongst various welding techniques, Xia et al introduced tungsten inert gas (TIG) welding as the most suitable method to study weldability of nichrome due to its flexibility in controlling welding parameters [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of TIG welding process on microstructure, electrical resistance and mechanical properties of Nichrome 8020

Afkhami¹,

Halvaee²

2016

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Studies on weldability of nichrome-laminated powder alloy using TIG welding

Cited by 3 publications

References 14 publications

Joinability of Particulate Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

Joinability of Particulate Reinforced Alumix 231 Based Composite Materials Produced by Powder Metallurgy Route

Effects of TIG welding process on microstructure, electrical resistance and mechanical properties of Nichrome 8020

Effects of TIG welding process on microstructure, electrical resistance and mechanical properties of Nichrome 8020

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