Microstructural development of diffusion-brazed austenitic stainless steel to magnesium alloy using a nickel interlayer
Microstructural development of diffusion-brazed austenitic stainless steel to magnesium alloy using a nickel interlayer
复制标题
DOI：
10.1016/j.matchar.2010.04.001
复制
发表时间：
2010-07-01
影响因子：
4.7
通讯作者：
Khan, Tahir I.
中科院分区：
文献类型：
--
作者：
Elthalabawy, Waled M.;Khan, Tahir I.
不锈钢和镁合金在物理和冶金性能上的差异使得它们难以使用传统的熔焊工艺进行连接。因此，316L钢与镁合金（AZ 31）的扩散钎焊采用双级连接工艺。为了连接这些不同的合金，在900 ℃下进行316L钢与Ni中间层的固态扩散结合，然后在510 ℃下扩散钎焊到AZ 31。金相和成分分析表明，实现了冶金结合，剪切强度为54 MPa。然而，在扩散钎焊阶段期间，B-2金属间化合物在接头内形成，并且这些金属间化合物在接头的等温凝固期间被推到固/液界面之前。当接头在扩散钎焊温度下保持超过20分钟时，这些金属间化合物对接头强度有不利影响。All rights reserved.
The differences in physical and metallurgical properties of stainless steels and magnesium alloys make them difficult to join using conventional fusion welding processes. Therefore, the diffusion brazing of 316L steel to magnesium alloy (AZ31) was performed using a double stage bonding process. To join these dissimilar alloys, the solid-state diffusion bonding of 316L steel to a Ni interlayer was carried out at 900 degrees C followed by diffusion brazing to AZ31 at 510 degrees C. Metallographic and compositional analyses show that a metallurgical bond was achieved with a shear strength of 54 MPa. However, during the diffusion brazing stage B-2 intermetallic compounds form within the joint and these intermetallics are pushed ahead of the solid/liquid interface during isothermal solidification of the joint. These intermetallics had a detrimental effect on joint strengths when the joint was held at the diffusion brazing temperature for longer than 20 min. (C) 2010 Elsevier Inc. All rights reserved.