Effect of beam offset on the characteristics of copper/304stainless steel electron beam welding

Guo, Shun; Zhou, Qi; Kong, Jian; Peng, Yong; Xiang, Yan; Luo, T.; Wang, Kehong; Zhu, Jun

doi:10.1016/j.vacuum.2016.03.034

Cited by 74 publications

(32 citation statements)

References 22 publications

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“…Fig.4a shows that Ti/Cu EBW with a positive offset on copper side has an obvious trend of first increase and then decrease. The curve is consistent with former welding-brazing studies [2,3,19,27]. There is a reasonable window for the offset.…”

Section: Bonding Characteristicssupporting

confidence: 88%

“…Lots of previous studies [3,4,22,23] have shown that non-centered welding was useful for dissimilar metals welding but needed to be further optimized. Therefore, a new improved method of adjacent welding was used in this paper.…”

Section: Welding Methodsmentioning

confidence: 99%

“…There is no cross between There are two types of transverse sections of weld seam due to different welding direction, but many experiments indicated that the effect of welding direction is not significant. Due to the characteristics of deep and narrow weld of EBW, quality of weld root was poor [3,24,25]. To improve the root strength, small power root welding was added in the paper.…”

Section: Welding Methodsmentioning

confidence: 99%

“…Dissimilar metals welding is an important technology in the modern industry. It is characterized by the ability to maximize the use of a variety of advantages of materials for industrial production [1][2][3][4][5]. The effective connection of Ti/Cu dissimilar materials not only meets the requirements of thermal conductivity, electrical conductivity, corrosion resistance and wear resistance, but also meets the requirements of high strength but light weight.…”

Section: Introductionmentioning

confidence: 99%

“…Electron beam welding (EBW), with high energy density, large depth to width ratio, and cutting off the adverse effects of air under vacuum [3,21], is of high interest for the welding of dissimilar materials. Liu [22] reported that using non-centered electron beam for the welding of QCr0.8 and TC4, the maximum value of tensile strength was 270.5 Mpa, equivalent to 75% that of QCr0.8.…”

Section: Introductionmentioning

confidence: 99%

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Study on strengthening mechanism of Ti/Cu electron beam welding

et al. 2017

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Welding-brazing method is widely used for dissimilar metals welding. However, it is becoming increasingly difficult to further improve the connection strength by controlling the formation of the transition layer. In this study, an innovative welding method referred to as adjacent welding was addressed, which greatly improved the tensile strength of Ti/Cu dissimilar joint. The strength of new joint could reach up to 89% that of copper base metal, compared to the use of a traditional welding-brazing method which strength coefficient is within the limit of 70%. In order to determine the strengthening mechanism of adjacent welding, optical microscopy, SEM, EDS and XRD were applied for the analysis of microstructure and phase structure. Furthermore, tensile strength was also tested. The results show that due to the process of remelting and reverse solidification of intermetallic compounds (IMCs) layer, a less complex and thinner IMCs layer was formed and TiCu (553HV) with high embrittlement existing in the front of titanium substrate was changed into Ti2Cu (442HV). Performances of joints were optimized by these changes. An interpretation module was presented for the mechanism.

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Section: Bonding Characteristicssupporting

confidence: 88%

Section: Welding Methodsmentioning

confidence: 99%

Section: Welding Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on strengthening mechanism of Ti/Cu electron beam welding

et al. 2017

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Interfacial Characteristics and Mechanical Properties of 316L and S214 Bimetals Fabricated by Wire‐Arc Additive Manufacturing

Meng,

Ye,

Chen

et al. 2023

Adv Eng Mater

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Cold metal transition wire‐arc deposition of S214 bronze/316 L stainless steel bimetals is investigated, and the effects of heat input and deposited sequence on the interfacial behavior of bimetallic structure are systematically characterized. It is demonstrated that 316 L and S214 bimetals are defect‐free, with no penetrating cracks or porosity, and that satisfactory metallurgical bonding at the interface is obtained. The interface thickness with low heat input is greater than that with high heat input, and the microstructure of the interface has a honeycomb pattern. The interfacial zone presents the highest microhardness due to the formation of Fe‐based solid solutions with high copper content and intermetallic compounds such as AlCrFe2 and AlNi3. As increasing heat input, microstructure of S214 deposited layer in the S214/316 L transforms from α‐Cu+γ + Fe‐rich phase to α‐Cu + Fe‐rich phase + K phase, and 316 L deposited layer changes from lath ferrite to skeletal ferrite with the determinations of copper and cooling rate. The tensile strength of S214/316 L specimen is substantially higher than that of 316 L/S214.

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