Under the same temperature condition, the impact toughness of the aluminum alloy decreases with the increase of the degree of torsional hardening. When the degree of torsional hardening is small, the decrease of the impact toughness is smaller. With the increase of the degree of torsional hardening, the impact toughness of the aluminum alloy.The decline has increased. In the same degree of torsional hardening, in a certain temperature range, with the temperature decreases, the impact toughness of aluminum increased slightly.Under the natural

climatic conditions, Aluminum Alloy can ignore the effect of temperature on the impact toughness in the process. At the same time, this paper constructed the impact toughness function at the same temperature and torsion degree of hardening Aluminum Alloy based on, and in the same degree of hardening under torsion and temperature relationship function.

Keywords: Aluminum alloy; Torsion hardening; Tensile experiment; Strength property; Plastic property; Impact toughness

目 录

第一章绪 论 1

1.1前言 1

1.2国内外研究现状 1

1.2.1扭转冷作硬化的国内研究现状 1

1.2.2扭转冷作硬化的国外研究现状 2

1.3铝合金的主要特性和用途 3

1.4本文主要研究的内容 3

第二章实验方案、原理及试样的制备 4

2.1实验方案 4

2.1.1扭转实验方案 4

2.2.2拉伸实验方案 5

2.2.3冲击实验方案 5

2.3实验原理 6

2.3.1拉伸实验原理 6

2.3.2冲击实验原理 7

2.3.3扭转实验原理 7

2.4试样的制备 7

2.4.1扭转试样的制备 7

2.4.2拉伸试样的制备 8

2.4.3冲击式样的制备 10

2.5小结 11

第三章扭转硬化对铝合金拉伸力学性能影响的研究 12

3.1实验程序 12

3.2未硬化拉伸试样拉伸实验 13

3.2.1未硬化拉伸试样实验前准备工作 13

3.2.2未硬化拉伸试样拉伸实验步骤 14

3.2.3铝合金硬化前的拉伸力学性能 15

3.3硬化后拉伸试样拉伸实验 16

3.3.1硬化后拉伸试样拉伸实验步骤 16

3.3.2硬化后铝合金的各项拉伸力学性能 16

3.3.3硬化后铝合金的强度性能分析 17

3.3.4硬化后铝合金的塑性性能分析 18

3.3.5扭转硬化用于强化铝合金的建议 19

3.4构建铝合金在常温常态下强度性能及塑性性能与扭转硬化程度的关系函数...19

3.4.1规定非比例延伸强度曲线拟合