文章信息/Info

Title:

The Effect of Pulsed Magnetic Treatment on Mechanical Properties and Microstructure of Ni

文章編號(hào):

1674-3962(2024)06-0558-07

作者:

丁雪; 劉劍; 吳明霞; 陳朝浪; 余林濤

1. 四川大學(xué)機(jī)械工程學(xué)院，四川 成都 610065 2. 睿恩光電有限責(zé)任公司，四川 攀枝花 617000

Author(s):

DING Xue; LIU Jian; WU Mingxia; CHEN Chaolang; YU Lintao

1. School of Mechanical Engineering，Sichuan University，Chengdu 610065，China 2. Ruien OE Technology Inc，Panzhihua 617000，China

關(guān)鍵詞:

鐵磁材料; 脈沖磁場(chǎng)處理; 硬度; 拉伸性能; 缺陷分布

Keywords:

ferromagnetic material;  pulsed magnetic treatment;  hardness;  tensile property;  defects distribution

分類號(hào):

TG146.1+5

DOI:

10.7502/j.issn.1674-3962.202311019

文獻(xiàn)標(biāo)志碼:

A

摘要:

脈沖磁場(chǎng)處理（PMT）是一種便捷高效、綠色環(huán)保的后處理方法，可利用脈沖磁場(chǎng)改善金屬材料性能。為了研究PMT對(duì)純鎳（Ni）力學(xué)性能和微觀組織的影響，揭示PMT對(duì)鐵磁性材料的潛在影響機(jī)制，采用不同磁場(chǎng)強(qiáng)度PMT對(duì)純Ni樣品進(jìn)行處理，并對(duì)處理前后純Ni樣品力學(xué)性能、微觀組織進(jìn)行分析。實(shí)驗(yàn)結(jié)果表明，經(jīng)強(qiáng)度為0.5~1.5 T的PMT后，樣品硬度降低，當(dāng)脈沖磁場(chǎng)強(qiáng)度為1.5 T時(shí)，強(qiáng)度較未處理樣品最小下降0.36%；對(duì)于拉伸性能而言，當(dāng)磁脈沖強(qiáng)度為1.5 T時(shí)，抗拉強(qiáng)度和延伸率同時(shí)得到最大提升,較未處理樣品提升4.19%和1.65%,而當(dāng)磁脈沖強(qiáng)度為0.5和1.0 T時(shí)樣品無明顯變化。對(duì)樣品微觀組織進(jìn)行表征，觀察到樣品中的缺陷分布改變，出現(xiàn)晶界處位錯(cuò)向晶胞內(nèi)移動(dòng)，形成小位錯(cuò)的聚集和不完整的位錯(cuò)胞壁；PMT對(duì)微觀缺陷的調(diào)控改善了樣品的拉伸性能。

Abstract:

Pulsed magnetic treatment (PMT) is a convenient, efficient and green post�瞭reatment method, which utilizes magnetic fields to improve the properties of metal materials. In order to study the effect of PMT on the mechanical properties and microstructure of pure nickel (Ni), and to reveal the potential influence mechanism of PMT on ferromagnetic materials, the pure Ni samples were treated with pulsed magnetic fields at different magnetic intensity, and the mechanical properties and microstructure were analyzed before and after the treatment. The experimental results show that the hardness of Ni samples was decreased by PMT of 0.5-1.5 T, with a minimum decrease of 0.36% at a magnetic intensity of 1.5 T. For tensile properties，the maximum increase in tensile strength and elongation was obtained at a magnetic pulse strength of 1.5 T, with increases of 4.19% and 1.65% compared to the untreated one, and with little change at 0.5 and 1.0 T. Changes in the distribution of defects in Ni samples were observed in the microscopic characterization. The dislocations at the grain boundaries moved into the grain cells, forming the aggregation of small dislocations and incomplete dislocation cell walls, and the change of the microscopic defects improved the tensile properties of the pure Ni samples.