旋片喷丸对7B04-T6铝合金应力腐蚀抗性的影响

TB304; 为研究喷丸对7B04-T6铝合金应力腐蚀抗性和静态力学性能的影响,采用旋片喷丸技术对7B04-T6铝合金进行0.1～0.2 A、0.2～0.3 A两种喷丸强度的表面强化处理,进行喷丸前后试样表面粗糙度和残余应力的测定与分析、表面形貌观察、恒载荷应力腐蚀测试、材料静态强度对比测试,并用扫描电子显微镜对断口进行观察分析.结果表明:0.1～0.2 A和0.2～0.3 A两种喷丸强度可分别在7B04-T6铝合金表面形成?350 MPa和?275 MPa残余压应力;表面粗糙度Ra从喷丸前的0.9μm分别增大至1.6μm和1.8μm;在3％NaCl+0.5％H2O2(质量分数)溶液中、(35...

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Published in航空材料学报 Vol. 40; no. 6; pp. 52 - 58
Main Authors 贺旺, 王燕礼, 王亚南, 刘金生, 谭志国, 高建
Format Journal Article
LanguageChinese
Published 国营芜湖机械厂,安徽芜湖 241000%中国人民解放军32256部队,昆明 650021%中国航发北京航空材料研究院,北京 100095 01.12.2020
Subjects
旋片喷丸
7B04-T6
静态强度
应力腐蚀开裂
残余应力
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ISSN1005-5053
DOI10.11868/j.issn.1005-5053.2020.000075

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Abstract TB304; 为研究喷丸对7B04-T6铝合金应力腐蚀抗性和静态力学性能的影响,采用旋片喷丸技术对7B04-T6铝合金进行0.1～0.2 A、0.2～0.3 A两种喷丸强度的表面强化处理,进行喷丸前后试样表面粗糙度和残余应力的测定与分析、表面形貌观察、恒载荷应力腐蚀测试、材料静态强度对比测试,并用扫描电子显微镜对断口进行观察分析.结果表明:0.1～0.2 A和0.2～0.3 A两种喷丸强度可分别在7B04-T6铝合金表面形成?350 MPa和?275 MPa残余压应力;表面粗糙度Ra从喷丸前的0.9μm分别增大至1.6μm和1.8μm;在3％NaCl+0.5％H2O2(质量分数)溶液中、(35±1)℃、350 MPa恒载荷作用下应力腐蚀持续时间分别较未喷丸试样提高11.3倍和8.7倍,0.1～0.2 A喷丸强度改善效果更佳;喷丸处理不改变材料的强度极限和断面收缩率,两种喷丸工艺对静态强度和断面收缩率的影响一致.
AbstractList TB304; 为研究喷丸对7B04-T6铝合金应力腐蚀抗性和静态力学性能的影响,采用旋片喷丸技术对7B04-T6铝合金进行0.1～0.2 A、0.2～0.3 A两种喷丸强度的表面强化处理,进行喷丸前后试样表面粗糙度和残余应力的测定与分析、表面形貌观察、恒载荷应力腐蚀测试、材料静态强度对比测试,并用扫描电子显微镜对断口进行观察分析.结果表明:0.1～0.2 A和0.2～0.3 A两种喷丸强度可分别在7B04-T6铝合金表面形成?350 MPa和?275 MPa残余压应力;表面粗糙度Ra从喷丸前的0.9μm分别增大至1.6μm和1.8μm;在3％NaCl+0.5％H2O2(质量分数)溶液中、(35±1)℃、350 MPa恒载荷作用下应力腐蚀持续时间分别较未喷丸试样提高11.3倍和8.7倍,0.1～0.2 A喷丸强度改善效果更佳;喷丸处理不改变材料的强度极限和断面收缩率,两种喷丸工艺对静态强度和断面收缩率的影响一致.
Author 刘金生
贺旺
高建
谭志国
王亚南
王燕礼
AuthorAffiliation 国营芜湖机械厂,安徽芜湖 241000%中国人民解放军32256部队,昆明 650021%中国航发北京航空材料研究院,北京 100095
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WANG Yanli
WANG Yanan
HE Wang
LIU Jinsheng
TAN Zhiguo
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Keywords 旋片喷丸
7B04-T6
静态强度
应力腐蚀开裂
残余应力
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Snippet TB304; 为研究喷丸对7B04-T6铝合金应力腐蚀抗性和静态力学性能的影响,采用旋片喷丸技术对7B04-T6铝合金进行0.1～0.2 A、0.2～0.3 A两种喷丸强度的表面强化处理,进行喷丸前...
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Title 旋片喷丸对7B04-T6铝合金应力腐蚀抗性的影响
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