Effect of calcium on the microstructure and mechanical properties of brazed joint using Ag–Cu–Zn brazing filler metal

► Effect of Ca on brazed joint using Ag–Cu–Zn brazing filler metal was investigated. ► 0.1wt.% Ca resulted in the formation of brittle CaCu, which caused voids. ► Ca addition led to coarser and irregular distribution of phases in the matrix. ► Tensile strength decreased with the increment of Ca. ► C...

Full description

Saved in:
Bibliographic Details
Published in:Materials in engineering 2013-04, Vol.46, p.605-608
Main Authors: Sui, Fangfei, Long, Weimin, Liu, Shengxin, Zhang, Guanxing, Bao, Li, Li, Hao, Chen, Yong
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Brazed joints
BRAZING
Brittleness
HARDNESS
JOINTS
MECHANICAL PROPERTIES
Microhardness
Microstructure
MICROSTRUCTURES
PROPERTIES
Silver
Tensile strength
VOIDS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► Effect of Ca on brazed joint using Ag–Cu–Zn brazing filler metal was investigated. ► 0.1wt.% Ca resulted in the formation of brittle CaCu, which caused voids. ► Ca addition led to coarser and irregular distribution of phases in the matrix. ► Tensile strength decreased with the increment of Ca. ► Ca-containing brazed joints had higher microhardness than the Ca-free ones. The induction brazing of 316LN stainless steel using Ag–Cu–Zn filler metal containing various content of Ca was carried out to investigate the influence of impurity element Ca on the microstructure and mechanical properties of the brazed joint. The results showed that Ca additions caused the coarser of the grains and their irregular distribution. Increase of the Ca content resulted in the formations of brittle intermetallic compounds (IMCs) CaCu which perhaps lead to the formations of voids. All of the calcium-containing brazed joints performed better in microhardness than calcium-free ones and brazed joints containing 0.003wt.% Ca showed the highest microhardness of 203HV. While the tensile strength decreased with the increment of Ca, from 460MPa to 400MPa. The combination effects of coarser grains, brittle IMCs and voids conduced to the reduction of tensile strength and microhardness of the brazed joints.
ISSN:0261-3069
DOI:10.1016/j.matdes.2012.11.021