高性能铝合金大规格挤压材制造与应用技术
项目来源
国(略)研(略)((略)D(略)
项目主持人
范(略)
项目受资助机构
东(略)金(略)任(略)
立项年度
2(略)
立项时间
未(略)
项目编号
2(略) YFB0300900
项目级别
国(略)
研究期限
未(略) (略)
受资助金额
0(略)万(略)
学科
重(略)材(略)提(略)业(略)
学科代码
未(略)
基金类别
“重(略)材(略)提(略)业(略)”重点专项
关键词
A(略)n(略)-(略)金(略)时(略) (略)微(略);(略)性(略) (略)Z(略)g(略) (略)o(略) (略)n(略)r(略)m(略) (略)i(略)s(略)c(略)e(略)P(略)e(略)e(略)
参与者
吴(略)
参与机构
未(略)
项目标书摘要:本文(略)-9.0Zn-2.(略),研究了单级和双级(略)特征、导电性、硬度(略)表明,单级时效处理(略)不断增大,硬度在单(略)在双级时效处理下硬(略)效处理的极限抗拉强(略)4h后屈服强度达到(略)下的双级时效处理的(略)而降低。通过性能测(略)76状态的试样进行(略),T76合金中析出(略)较多,晶界析出物不(略)DPs和HREM观(略)金中的主要沉淀相“(略)η'相阶段”和“η(略)
Applicati(略): In this(略)effects o(略)d double (略)crostruct(略)ivity,har(略)echanical(略) of the p(略) phase we(略)for a hig(略)ent al-9.(略)-2.0 Cu a(略)sult show(略)ness and (略)y for one(略) treatmen(略)with agin(略)ongs whil(略) two-step(略)tment exh(略)ent and d(略)spectivel(略)he ultima(略)strength((略)ld streng(略)ne-step a(略) aging tr(略)ow slow i(略) obvious (略)spectivel(略)these,typ(略) T76 agin(略)re extrac(略)rostructu(略)ion.The m(略)pitates f(略)lloy have(略) and disp(略)ribution (略)for the T(略)s big siz(略)e distrib(略)rain boun(略)itates fo(略)bit disco(略)stributio(略)76 alloy (略)size and (略)cipitate (略)The selec(略)ffraction(略)nd HREM o(略) reveal t(略)ecipitate(略)6 alloy a(略),GPII zon(略)se while (略) alloy ar(略)nd η phas(略)
项目受资助省
黑(略)
1.高性能铝合金大规格挤压材制造与应用技术年度报告(Technology report on manufacture and application of high performance aluminum alloy extruder)
- 关键词:
- Al-Zn-Mg-Cu合金、时效处理、显微组织、力学性能、Al-Zn-Mg-Cu alloy、Aging treatment、Microstructure、Properties
- 吴沂哲;
- 《东北轻合金有限责任公司;》
- 2019年
- 报告
本文针对一种高锌含量的Al-9.0Zn-2.0Mg-2.0Cu合金,研究了单级和双级时效对析出相的显微组织特征、导电性、硬度和力学性能的影响。结果表明,单级时效处理和双级时效处理时电导率不断增大,硬度在单级时效处理下基本增大,在双级时效处理下硬度减小。120℃一次时效处理的极限抗拉强度基本保持平台状态,24h后屈服强度达到峰值。第二阶段160℃下的双级时效处理的强度随着保存时间的延长而降低。通过性能测试,选取了典型T6和T76状态的试样进行显微组织观察。结果表明,T76合金中析出相较多,基体弥散析出相较多,晶界析出物不连续分布程度较深。SADPs和HREM观测表明,T6和T76合金中的主要沉淀相“GPI区+GPII区+η'相阶段”和“η'相+η相”。 In this paper,the effects of single and double aging on microstructure,conductivity,hardness and mechanical properties of the precipitated phase were studied for a high zinc content al-9.0 zn-2.0 mg-2.0 Cu alloy.The result shows that hardness and conductivity for one-step aging treatment increase with aging time prolongs while those for two-step aging treatment exhibit increment and decrement,respectively.Besides,the ultimate tensile strength(UTS)and yield strength(YS)for one-step and two-step aging treatments show slow increase and obvious decrease,respectively.Based on these,typical T6 and T76 aging regimes are extracted for microstructure observation.The matrix precipitates for the T6 alloy have small size and dispersive distribution while that for the T76 alloy has big size and sparse distribution.The grain boundary precipitates for both exhibit discontinuous distribution and the T76 alloy has larger size and broader precipitate free zones.The selected area diffraction patterns and HREM observations reveal that main precipitates for the T6 alloy are GPI zone,GPII zone and η'phase while for the T76 alloy are η'phase and η phase.
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