Influence of melt overheating on microstructure and soldering properties of SnBiCu solder alloy

Chen, Z. H.; Bao, Xiaoqi; Huang, Zhangyi; Wang, G.; Zhu, Xiangwei; Sun, Yongzhen

doi:10.4149/km_2015_2_79

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…This is mainly due to the restrictions imposed on the use of lead-containing alloys, and also to a combination of suitable soldering characteristics and mechanical properties they can offer [1]. Accordingly, several lead-free tin-based alloy systems with different alloying elements such as Ag, Bi, Cu, In, Ni, Sb, and Zn have been developed, and their microstructures, mechanical properties, and creep behaviour have been reported [2,3].…”

Section: Introductionmentioning

confidence: 99%

High-temperature shear strength and hardness of cast lead-free solders

Mahmudi¹,

Maraghi²,

Geranmayeh³

2017

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This paper compares the shear strength and hardness of the tin-based cast lead-free Sn-2Bi, Sn-5Sb, and Sn-9Zn binary solder alloys. This was achieved respectively by the shear punch testing (SPT) and Vickers hardness measurement in the temperature range 298-370 K. The results showed that the shear yield stress (SYS), ultimate shear strength (USS), and hardness (Hv) of all three alloys decrease with increasing test temperature. Among all tested materials, Sn-2Bi showed the highest strength and hardness over the whole testing temperature range. This is ascribed to the strong solid solution effect of Bi in the Sn matrix, which is superior to the weak solution hardening and particle strengthening effects of Sb in Sn-5Sb, and particle hardening of Zn in Sn-9Zn. K e y w o r d s : lead-free solder, shear strength, hardness

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Section: Introductionmentioning

confidence: 99%

High-temperature shear strength and hardness of cast lead-free solders

Mahmudi¹,

Maraghi²,

Geranmayeh³

2017

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Detection of the liquid–liquid transitions in superalloys melts upon overheating and relaxation by the electromagnetic method

Tyagunov

Milder

et al. 2021

Journal of Applied Physics

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Among numerous melt structure model representations, the most relevant for liquid heat-resistant nickel alloys description is the quasicrystalline model of a microinhomogeneous structure, in which it is assumed that multicomponent nickel melts consist of clusters and intercluster space. Clusters inherit the short-range order of the atomic structure from various phases of the initial solid metal crystalline structure. Heating the melt to a certain temperature and/or increasing a period of its isothermal holding at constant pressure led to a second-order phase liquid–liquid phase transition (LLT). As a result, atomic associations that are more balanced and uniformly distributed over the melt volume are formed. Structural changes in nickel superalloy melts are irreversible and have a significant effect on the formation of the structure and properties of a solid metal during crystallization. Structural LLT changes in multicomponent nickel melts are the basis for a scientific substantiation of the technological modes of smelting, which contributes to an improvement in the technological properties of melts, a reduction of metallurgical defects, a rational use of expensive elements and foundry waste, as well as a significant improvement in the quality of metal products. This work is devoted to the experimental determination of the LLT transition in superalloy melts by the noninvasive electromagnetic method.

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