Fe/polymer joining via Fe/TiB2 composite structures via in-situ laser-induced reaction of Fe-Ti-B system: Effect of powder composition

IF 3.8 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Advanced Joining Processes Pub Date : 2024-09-02 DOI:10.1016/j.jajp.2024.100249
Shaoyun Zhou, Koki Omiya, Yuto Ueda, Asuka Suzuki, Naoki Takata, Makoto Kobashi
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Abstract

Achieving strong direct joining between steel and polymers through mechanical interlocking is crucial for developing multi-material structures, particularly in the automotive and aerospace industries. This study synthesized micro-scale structures on a pure Fe substrate (simulating interstitial-free (IF) steel) for mechanical interlocking with thermoplastic parts. Numerous submillimeter-scale Fe/TiB2 composite particles were in-situ synthesized by laser scanning on the Fe-Ti-B powder mixture and well-bonded with the Fe substrate. The effects of powder composition (TiB2 volume fraction) on the morphology, microstructure, and joint strength with PA6 were investigated. A TiB2 volume fraction over 60 % was essential for the formation of the composite particles promoted by a TiB2 skeletal structure. Higher TiB2 volume fractions increased the area fraction of the composite particles and decreased the bonding ratio (adhesive) of the particles with the substrate due to poor adhesiveness at the edge of the laser-scanning line. A wider high-temperature region was generated at a higher TiB2 volume fraction, suggesting that the reaction heat to form TiB2 assisted the bonding of the particles with the substrate at the edge of the laser scanning line. The Fe/PA6 joint strength increased to approximately 30 MPa with increasing the TiB2 volume fraction to 100 % and showed a linear correlation with the product of particle area fraction and bonding ratio. A higher TiB2 volume fraction was preferable for enhancing the joint strength via the micro-scale structures synthesized by laser scanning on the Fe-Ti-B powder mixture. A combination of the micro-structuring process using a high fraction of TiB2 with advanced joining technologies will contribute to manufacturing high-strength Fe/polymer hybrid parts.

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通过原位激光诱导 Fe-Ti-B 系统反应,在 Fe/TiB2 复合结构中加入铁/聚合物:粉末成分的影响
通过机械互锁实现钢与聚合物之间的强力直接连接对于开发多材料结构至关重要,尤其是在汽车和航空航天工业领域。本研究在纯铁基底(模拟无间隙(IF)钢)上合成了微尺度结构,用于与热塑性部件进行机械联锁。通过激光扫描在 Fe-Ti-B 粉末混合物上原位合成了大量亚毫米级的 Fe/TiB2 复合材料颗粒,并与铁基材很好地结合在一起。研究了粉末成分(TiB2 体积分数)对形态、微观结构以及与 PA6 的接合强度的影响。TiB2 体积分数超过 60% 对形成由 TiB2 骨架结构促进的复合颗粒至关重要。较高的 TiB2 体积分数增加了复合材料颗粒的面积分数,但由于激光扫描线边缘的粘合性较差,降低了颗粒与基材的粘合率(粘合力)。TiB2 体积分数越高,产生的高温区域越宽,这表明形成 TiB2 的反应热有助于颗粒与激光扫描线边缘基底的粘合。随着 TiB2 体积分数增加到 100%,Fe/PA6 接头强度增加到约 30 兆帕,并且与颗粒面积分数和结合率的乘积呈线性相关。较高的 TiB2 体积分数更有利于通过激光扫描在 Fe-Ti-B 粉末混合物上合成的微尺度结构来提高接头强度。将使用高比例 TiB2 的微结构工艺与先进的连接技术相结合,将有助于制造高强度的铁/聚合物混合零件。
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来源期刊
CiteScore
7.10
自引率
9.80%
发文量
58
审稿时长
44 days
期刊最新文献
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