激光喷丸A356铝合金的热稳定性实验研究

谢小江; 周建忠; 陈寒松; 黄舒; 孟宪凯; 戴磊

doi:10.7510/jgjs.issn.1001-3806.2014.01.020

激光喷丸A356铝合金的热稳定性实验研究

1.
江苏大学机械工程学院, 镇江 212013

作者简介: 谢小江（1988- ），男，硕士，主要研究方向为激光喷丸强化技术。.

通讯作者: 周建忠, zhoujz@ujs.edu.cn ;

基金项目:
国家自然科学基金资助项目（51175236）;江苏省普通高校研究生科研创新计划资助项目（CXZZ12_0659）;江苏大学科研立项资助项目（11A78）
中图分类号: TG665

Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

1.
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn ;

CLC number: TG665

摘要: 为了研究激光喷丸技术对A356铝合金热稳定性能的影响，采用Nd：YAG激光器对其进行表面激光喷丸处理及将各试样进行220℃退火试验处理的方法，从微观组织、显微硬度及残余应力等方面进行理论分析和实验验证，取得了一系列实验数据。结果表明，激光喷丸处理能够有效提高A356铝合金的热稳定性能，且在材料表面诱导了较大残余压应力，显微硬度和位错密度得到显著提高，晶粒明显细化；退火后，激光喷丸试样的表面残余压应力下降了30.68%，位错密度从1.63°降到1.51°，显微硬度下降19.42%，表层晶粒尺寸有所长大，但较基体而言，其晶粒尺寸长大幅度较小。这一结果对于拓展激光喷丸技术和A356铝合金的应用领域是有帮助的。
- 激光技术 /
- 热稳定性 /
- 激光喷丸强化 /
- 残余压应力 /
- 位错密度
Abstract: In order to study the influence of laser shock peening on the thermal stability property of A356 Al alloy, after laser shock peening A356 Al alloy workpieces with Nd:YAG laser and annealing them at 220℃ their microstructure, micro-hardness and residual stress were studied. A series of experimental data were got. The results showed that laser shock peening can effectively improve the thermal stability of A356 Al alloys. The large residual compressive stress was induced by laser shock peening on the surface, micro-hardness and the surface dislocation density was increased significantly; the grain was refined obviously. After annealing, the residual compressive stress was decreased by 30.68%, the dislocation density (full width at half maximum) was decreased from 1.63°to 1.51°, and the micro-hardness was decreased by 19.42%, the grain size on the surface layer was grown up slightly. However, compared to the matrix, the scale was less. The results were helpful to expand application fields of laser shock peening and A356 Al alloy.
- laser technique /
- thermal stability /
- laser shock peening /
- residual compressive stress /
- dislocation density

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激光喷丸A356铝合金的热稳定性实验研究

作者简介: 谢小江（1988- ），男，硕士，主要研究方向为激光喷丸强化技术。.

通讯作者: 周建忠, zhoujz@ujs.edu.cn ;

Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn ;

计量

激光喷丸A356铝合金的热稳定性实验研究

通讯作者: 周建忠, zhoujz@ujs.edu.cn;

作者简介: 谢小江（1988- ），男，硕士，主要研究方向为激光喷丸强化技术。

English Abstract

Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn

全文HTML

目录

留言板

激光喷丸A356铝合金的热稳定性实验研究

作者简介: 谢小江（1988- ），男，硕士，主要研究方向为激光喷丸强化技术。.

通讯作者: 周建忠, zhoujz@ujs.edu.cn ;

Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn ;

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激光喷丸A356铝合金的热稳定性实验研究

通讯作者: 周建忠, zhoujz@ujs.edu.cn;

作者简介: 谢小江（1988- ），男，硕士，主要研究方向为激光喷丸强化技术。

English Abstract

Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn

全文HTML

目录