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Article(id=1241321695236125143, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241321691524158287, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2025.02.034, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1727452800000, receivedDateStr=2024-09-28, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773883754786, onlineDateStr=2026-03-19, pubDate=1743436800000, pubDateStr=2025-04-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773883754786, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773883754786, creator=13701087609, updateTime=1773883754786, updator=13701087609, issue=Issue{id=1241321691524158287, tenantId=1146029695717560320, journalId=1235980550691926019, year='2025', volume='45', issue='2', pageStart='1', pageEnd='204', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773883753901, creator=13701087609, updateTime=1773884632018, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241325374676726363, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241321691524158287, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241325374676726364, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241321691524158287, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=193, endPage=196, ext={EN=ArticleExt(id=1241321696020460009, articleId=1241321695236125143, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Effect of Cr Content on Microstructure and Mechanical Properties of Al-Cu-Mg-Ag Alloy with a Low Cu/Mg Ratio, columnId=1236276108207902848, journalTitle=Mining and Metallurgical Engineering, columnName=MATERIALS, runingTitle=null, highlight=null, articleAbstract=

The effect of Cr content in mass fraction on the microstructure and mechanical properties of Al-Cu-Mg-Ag alloy with a low Cu/Mg ratio was investigated. Results indicate that after an addition of Cr to the Al-Cu-Mg-Ag alloy with low Cu/Mg ratio, phases of Al-Cr and Al1.6TiCr0.4 are generated in the alloy; with Cr content from 0.17% up to 0.22%, the alloy has its tensile strength improved from 463 MPa to 484 MPa (a 4.5% increase), and its yield strength enhanced from 288 MPa to 319 MPa (a 10.8% increase). The enhancement in mechanical properties is attributed to solid solution strengthening by Cr and precipitation strengthening by S′ phases.

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研究了Cr含量（质量分数）对低Cu/Mg比Al-Cu-Mg-Ag合金微观组织和力学性能的影响。结果表明：在低Cu/Mg比Al-Cu-Mg-Ag合金中添加Cr，合金中形成了Al-Cr相和Al1.6TiCr0.4相；Cr含量由0.17%提高到0.22%，合金的抗拉强度由463 MPa提高到484 MPa，提升了4.5%；屈服强度由288 MPa提高到319 MPa，提升了10.8%。合金力学性能的提升主要来源于Cr的固溶强化和S′相的析出强化。

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刘志义（1962—），男，湖南邵阳人，教授，博士研究生导师，主要从事铝合金的基础研究及应用技术开发。E-mail：
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杨国强（1999—），男，四川眉山人，硕士，主要从事铝合金微合金化研究。E-mail：

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杨国强（1999—），男，四川眉山人，硕士，主要从事铝合金微合金化研究。E-mail：

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杨国强（1999—），男，四川眉山人，硕士，主要从事铝合金微合金化研究。E-mail：

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Materials Science Engineering: A, 2017, 702: 29-40., articleTitle=Precipitation structure and strengthening mechanisms in an Al-Cu-Mg-Ag alloy, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1241327675680281463, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, xref=null, ext=[AuthorCompanyExt(id=1241327675688670070, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, companyId=1241327675680281463, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China), AuthorCompanyExt(id=1241327675692864375, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, companyId=1241327675680281463, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中南大学　材料科学与工程学院，湖南　长沙　410083)])], figs=[ArticleFig(id=1241327683095810360, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Fig.1, caption=Age-hardening curves of Al-Cu-Mg-Ag alloys with different Cr contents at 170 ℃, figureFileSmall=72YhBh9L8AQVLiLpRxeYkA==, figureFileBig=vYAewe6pAxoewLA/8wmcUw==, tableContent=null), ArticleFig(id=1241327683200667969, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=图1, caption=170 ℃下不同Cr含量Al-Cu-Mg-Ag合金的时效硬化曲线, figureFileSmall=72YhBh9L8AQVLiLpRxeYkA==, figureFileBig=vYAewe6pAxoewLA/8wmcUw==, tableContent=null), ArticleFig(id=1241327683339080015, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Fig.2, caption=Tensile properties of under-aged Al-Cu-Mg-Ag alloys with different Cr contents at room temperature, figureFileSmall=Rb7/GvmYSLoBWXgbvM8R8Q==, figureFileBig=cXNpB9Mkk76ApwrhKofwkA==, tableContent=null), ArticleFig(id=1241327683519435101, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=图2, caption=欠时效态下不同Cr含量Al-Cu-Mg-Ag合金的室温拉伸性能, figureFileSmall=Rb7/GvmYSLoBWXgbvM8R8Q==, figureFileBig=cXNpB9Mkk76ApwrhKofwkA==, tableContent=null), ArticleFig(id=1241327683632681315, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Fig.3, caption=XRD patterns of under-aged Al-Cu-Mg-Ag alloys with different Cr contents, figureFileSmall=3jo97xlOV6jm9nGswz4fIQ==, figureFileBig=cte9+nfWT5QqYYp7QQ1t1A==, tableContent=null), ArticleFig(id=1241327683783676267, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=图3, caption=欠时效态下不同Cr含量Al-Cu-Mg-Ag合金的XRD图谱, figureFileSmall=3jo97xlOV6jm9nGswz4fIQ==, figureFileBig=cte9+nfWT5QqYYp7QQ1t1A==, tableContent=null), ArticleFig(id=1241327683968225653, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Fig.4, caption=Microstructure of as-cast Al-Cu-Mg-Ag alloys with different Cr contents, figureFileSmall=mJIMADoI8rRByrxE5nImLg==, figureFileBig=PAx/t20MqFsAE82nEatNcw==, tableContent=null), ArticleFig(id=1241327684106637697, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=图4, caption=不同Cr含量Al-Cu-Mg-Ag铸态合金的显微组织

（a）A合金；（b）B合金

, figureFileSmall=mJIMADoI8rRByrxE5nImLg==, figureFileBig=PAx/t20MqFsAE82nEatNcw==, tableContent=null), ArticleFig(id=1241327684257632649, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Fig.5, caption=Bright field images of UA and UB samples along<100>α axis and corresponding SAED pattern, figureFileSmall=Kwg7FJPeWx9RaR+vDlb7Ag==, figureFileBig=F17AaRshyp9UIN40rzB55Q==, tableContent=null), ArticleFig(id=1241327684396044692, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=图5, caption=UA、UB样品沿<100>α轴的明场图像和相应的选区电子衍射（SAED）图

（a）UA样品；（b）UB样品

, figureFileSmall=Kwg7FJPeWx9RaR+vDlb7Ag==, figureFileBig=F17AaRshyp9UIN40rzB55Q==, tableContent=null), ArticleFig(id=1241327684614148513, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Table 1, caption=

Chemical composition of Al-Cu-Mg-Ag alloy

, figureFileSmall=null, figureFileBig=null, tableContent=
合金CuMgAgMnTiZrCrFeSiAl
A3.081.810.510.600.150.130.170.040.03余量
B3.131.840.530.610.140.130.220.040.03余量
), ArticleFig(id=1241327684752560553, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=表1, caption=

Al-Cu-Mg-Ag合金化学成分（质量分数）

, figureFileSmall=null, figureFileBig=null, tableContent=
合金CuMgAgMnTiZrCrFeSiAl
A3.081.810.510.600.150.130.170.040.03余量
B3.131.840.530.610.140.130.220.040.03余量
), ArticleFig(id=1241327684853223857, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Table 2, caption=

EDS analysis results of each point in Figure 4

, figureFileSmall=null, figureFileBig=null, tableContent=
点号CuMgMnCrFeAl
122.1022.950.310.150.28余量
25.503.643.410.682.27余量
319.4220.500.470.250.31余量
46.771.237.401.333.11余量
), ArticleFig(id=1241327684995830201, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=CN, label=表2, caption=

图4中各点的EDS分析结果（质量分数）

, figureFileSmall=null, figureFileBig=null, tableContent=
点号CuMgMnCrFeAl
122.1022.950.310.150.28余量
25.503.643.410.682.27余量
319.4220.500.470.250.31余量
46.771.237.401.333.11余量
), ArticleFig(id=1241327685079716293, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241321695236125143, language=EN, label=Table 3, caption=

Area fraction and size of S′ phase in UA and UB samples

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样品名称面积分数/%直径/nm
UA11.88.8
UB13.212.7
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UA、UB样品S′相的面积分数和尺寸统计

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样品名称面积分数/%直径/nm
UA11.88.8
UB13.212.7
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Cr含量对低Cu/Mg比Al-Cu-Mg-Ag合金微观组织和力学性能的影响
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杨国强 , 刘志义 , 柏松 , 李苏望 , 曹靖
矿冶工程杂志 | 材料 2025,45(2): 193-196
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矿冶工程杂志 | 材料 2025, 45(2): 193-196
Cr含量对低Cu/Mg比Al-Cu-Mg-Ag合金微观组织和力学性能的影响
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杨国强 , 刘志义 , 柏松, 李苏望, 曹靖
作者信息
  • 中南大学　材料科学与工程学院，湖南　长沙　410083

    • 杨国强（1999—），男，四川眉山人，硕士，主要从事铝合金微合金化研究。E-mail：

通讯作者:

刘志义（1962—），男，湖南邵阳人，教授，博士研究生导师，主要从事铝合金的基础研究及应用技术开发。E-mail：
Effect of Cr Content on Microstructure and Mechanical Properties of Al-Cu-Mg-Ag Alloy with a Low Cu/Mg Ratio
Guoqiang YANG , Zhiyi LIU , Song BAI, Suwang LI, Jing CAO
Affiliations
  • School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
出版时间: 2025-04-01 doi: 10.3969/j.issn.0253-6099.2025.02.034
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摘要
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研究了Cr含量（质量分数）对低Cu/Mg比Al-Cu-Mg-Ag合金微观组织和力学性能的影响。结果表明：在低Cu/Mg比Al-Cu-Mg-Ag合金中添加Cr，合金中形成了Al-Cr相和Al1.6TiCr0.4相；Cr含量由0.17%提高到0.22%，合金的抗拉强度由463 MPa提高到484 MPa，提升了4.5%；屈服强度由288 MPa提高到319 MPa，提升了10.8%。合金力学性能的提升主要来源于Cr的固溶强化和S′相的析出强化。

微合金化  /  Cu/Mg比  /  固溶强化  /  析出强化  /  Cr  /  Al-Cu-Mg-Ag合金  /  析出相  /  欠时效  /  力学性能

The effect of Cr content in mass fraction on the microstructure and mechanical properties of Al-Cu-Mg-Ag alloy with a low Cu/Mg ratio was investigated. Results indicate that after an addition of Cr to the Al-Cu-Mg-Ag alloy with low Cu/Mg ratio, phases of Al-Cr and Al1.6TiCr0.4 are generated in the alloy; with Cr content from 0.17% up to 0.22%, the alloy has its tensile strength improved from 463 MPa to 484 MPa (a 4.5% increase), and its yield strength enhanced from 288 MPa to 319 MPa (a 10.8% increase). The enhancement in mechanical properties is attributed to solid solution strengthening by Cr and precipitation strengthening by S′ phases.

microalloying  /  Cu/Mg ratio  /  solid solution strengthening  /  precipitation strengthening  /  Cr  /  Al-Cu-Mg-Ag alloy  /  precipitate  /  under-aging  /  mechanical property
杨国强, 刘志义, 柏松, 李苏望, 曹靖. Cr含量对低Cu/Mg比Al-Cu-Mg-Ag合金微观组织和力学性能的影响. 矿冶工程杂志, 2025 , 45 (2) : 193 -196 . DOI: 10.3969/j.issn.0253-6099.2025.02.034
Guoqiang YANG, Zhiyi LIU, Song BAI, Suwang LI, Jing CAO. Effect of Cr Content on Microstructure and Mechanical Properties of Al-Cu-Mg-Ag Alloy with a Low Cu/Mg Ratio[J]. Mining and Metallurgical Engineering, 2025 , 45 (2) : 193 -196 . DOI: 10.3969/j.issn.0253-6099.2025.02.034
正文
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Al-Cu-Mg-Ag合金因其优良的耐热性能和抗蠕变性能，广泛应用于航空航天领域和石油工业，但该合金存在热稳定性和耐腐蚀性较差的缺点[1-2]。学者们利用微合金化和优化热处理工艺等改善其性能。目前对Al-Cu-Mg-Ag合金力学性能的研究主要集中在高Cu/Mg比Al-Cu-Mg-Ag合金的主要析出相θ′相和Ω相[3-7]，而对低Cu/Mg比Al-Cu-Mg-Ag合金的主要析出相S（Al2CuMg）相的研究很少。Cr作为铝合金常用的微合金化元素，广泛添加在Al-Zn-Mg-Cu合金中[8-10]。郭帅[11]研究了Cr的微合金化对低Cu/Mg比Al-Cu-Mg合金的性能影响，但由于其Cr添加量较少，合金中未发现含Cr相。本文在此基础上，继续增加Cr添加量，研究Cr在低Cu/Mg比Al-Cu-Mg-Ag合金中的存在形式，并研究增加Cr添加量对低Cu/Mg比Al-Cu-Mg-Ag合金微观组织和力学性能的影响，以期促进含Cr的Al-Cu-Mg-Ag合金在石油和航天工业方面的应用。
1　实验方法
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实验原料主要为工业高纯铝、纯镁、纯银和Al-50Cu（元素前数据表示该元素的质量分数，下同）、Al-10Mn、Al-4Cr、Al-6Ti、Al-4Zr中间合金，通过熔炼、铸造，制备了Cr添加量分别为0.17%和0.22%的2种合金，分别命名为A合金和B合金，其化学成分见表1。
对A、B合金铸锭进行双级均匀化处理：420 ℃/24 h+480 ℃/48 h，空冷至室温；然后在空气炉内将铸锭加热至410 ℃并保温2 h，立即轧制成厚约2.5 mm的薄板；对A、B合金薄板样品进行500 ℃/1 h固溶处理和170 ℃/3 h欠时效处理，所得样品分别命名为UA、UB。
分别采用扫描电镜、透射电镜观察合金的微观组织和沉淀颗粒；在HV-10B型仪器上测试合金显微硬度，载荷5 kg，加载时间10 s；在WOW-50E型试验机上进行室温拉伸试验，拉伸速率2 mm/min。
2　实验结果与讨论
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2.1　合金时效硬化行为
经500 ℃/1 h固溶处理后，170 ℃下不同Cr含量（质量分数，下同）Al-Cu-Mg-Ag合金时效硬化曲线如图1所示。随着时效时间增加，A、B合金硬度都呈现先增加后降低的趋势，并且各时效时间下B合金的硬度均高于A合金的硬度。固溶处理后A合金的硬度值为84.2HV，B合金的硬度值为97HV，B合金表现出更强的固溶强化效应。时效8 h，A、B合金的硬度均到达时效峰值硬度，分别为140HV、150HV。继续延长时效时间，2种合金的硬度总体呈下降趋势。可以看出，增加Cr添加量可以使合金时效硬度提高，这归因于Cr的固溶强化效应。
2.2　合金拉伸性能
欠时效态下不同Cr含量Al-Cu-Mg-Ag合金室温拉伸性能如图2所示。随着Cr含量从0.17%增加到0.22%，合金抗拉强度从463 MPa提高到484 MPa，提高了4.5%；屈服强度从288 MPa提高到319 MPa，提高了10.8%；延伸率也有所提升。由此可见，随着微合金化程度提高，合金拉伸性能提高。
2.3　合金物相分析
欠时效态下不同Cr含量Al-Cu-Mg-Ag合金的XRD图谱如图3所示。从图3可知，UA、UB样品相组成几乎没有区别，都由于Cr的加入而形成了Al1.6TiCr0.4相和Al-Cr相。另外，合金中还有Al2CuMg、Al3Ti存在。
2.4　合金显微组织分析
不同Cr含量Al-Cu-Mg-Ag铸态合金的显微组织见图4。由图4可见，A、B铸态合金的晶粒尺寸并无明显差异，SEM形貌表现为典型的枝晶偏析特征，晶粒呈现等轴状。对图4中合金的第二相粒子进行了EDS分析，结果如表2所示。由表2可知，第二相粒子主要为Alx（Cu，Mn，Fe，Cr）和Al2CuMg相。Fe、Cr、Mn元素表现为互相聚集的状态，即Mn含量高的第二相其中Fe和Cr含量也相对较高。由于Cr的添加，A、B铸态合金中均形成了Alx（Cu，Mn，Fe，Cr）粒子，但晶粒大小并没有明显差异。
2.5　合金TEM分析
图5为UA、UB样品沿<100>α轴的明场图像和相应的选区电子衍射（SAED）图。可以看出，晶粒内部存在一些粗大的棒状T相（Al20Cu2Mn3）。在相应的SAED图中可以看见变体的S相（Al2CuMg）衍射斑点，由于样品为欠时效状态，为了了解Cr的添加对低Cu/Mg比Al-Cu-Mg-Ag合金相关析出相的大小和分布的影响，对UA、UB试样进行了TEM分析，结果见图5。合金中可能有S″和S′同时存在，本文暂不做区分，统一认为是S′相。未长大的短针状S′相大多为弥散分布，还有一些S′相在T相与Al基体的界面周围析出。对UA、UB样品沿<100>α轴的亮场图像中的短针状S′相（尺寸太小近乎看作球状）进行了面积分数和尺寸统计，结果如表3所示。UB样品中析出的S′相较UA样品析出的S′相的数量更多，尺寸更大。由此可以看出，提高Cr含量，可以使合金中S′析出相数量增加，从而提高合金性能。
2.6　讨论与分析
微合金化主要通过细化晶粒、影响强化相析出或形成相关金属间化合物影响合金的力学性能[12-17]。在微观组织结构上，Al合金中添加Cr元素会形成Al-Cr相（如Al7Cr、Al11Cr2、Al45Cr7等）和富含Cr、Fe、Mn、Cu的粒子[13-18]。文献[19]在Al-Mg-Si合金中添加0.07% Cr，诱导形成了Al45Cr7相，其作为α-Al的异质形核点，细化了晶粒。文献[11]在低Cu/Mg比Al-Cu-Mg合金中进行Cr的微合金化，却未发现明显的晶粒细化现象。在低Cu/Mg比的Al-Cu-Mg-Ag合金中，本文将Cr添加量从0.17%提高到0.22%，Cr添加量的增加并未导致明显的晶粒细化（图4）。提高Cr含量可以使S′相含量增加、尺寸增大（图5和表3），这是由于Cr以弥散粒子的形式作为异质形核点，促进了S′相的形核析出，在相同时间的欠时效状态下，UB样品的S′相的含量更多、尺寸更大，进而使UB样品室温下的拉伸强度和屈服强度更优。
在力学性能上，UB样品的硬度、拉伸强度、屈服强度均优于UA样品。考虑Cr元素添加影响欠时效Al-Cu-Mg-Ag合金力学性能的强化机制，其理论屈服强度[20-21]可估计为：
式中：σ0为纯铝的晶格摩擦应力；ΔσHP、ΔσSS、ΔσP分别为由晶界、固溶体原子和沉淀物引起的屈服强度增量。
细晶强化主要是晶粒尺寸差异引起的强度变化，由于两合金的晶粒大小基本没有差异，细晶强化对两合金所做出的贡献并无差距，可视为ΔσHP（UA）≈ΔσHP（UB）。
固溶强化增量可由固溶强化屈服强度增量的方程[21-22]来分析：
式中：ci为固溶体中溶质元素i的浓度，%；ki为相应的固溶体强化效率；m为与合金相关的常数，对于Al-Cu-Mg-Ag合金，m=1。在本实验中两合金的固溶强化增量的差异主要由Cr含量决定。cCr（UA）<cCr（UB），相对应的固溶体强化效率不变，则有ΔσSS（UA）<ΔσSS（UB）。
合金中的S′相尺寸太小，近似看作很小的圆形，忽略尺寸因素的影响，沉淀强化增量的分析方程[20]可表示为：
式中M、Δμ和fV分别为Al的泰勒因子、相与基体之间的剪切模量、颗粒的体积分数。本文以S′相的面积分数近似替代其体积分数，则有fV（UA）<fV（UB），沉淀强化增量ΔσP（UA）<ΔσP（UB）。
再将公式（2）、（3）所得结论代入公式（1）中，即可得：，这与实验结果吻合。
3　结论
收起
1）在低Cu/Mg比Al-Cu-Mg-Ag合金中添加0.17%Cr和0.22%Cr，都会形成Al1.6TiCr0.4相和Al-Cr相，且两者晶粒尺寸相差不大；相对于含0.17%Cr的合金，相同欠时效状态下，含0.22%Cr的合金中析出数量更多、粒径更大的S′相，表现出更优的力学性能。
2）Cr含量由0.17%提高到0.22%，合金抗拉强度由463 MPa提高到484 MPa，提升了4.5%；屈服强度由288 MPa提高到319 MPa，提升了10.8%。合金强化机制是Cr元素的固溶强化效应和S′（Al2CuMg）相的析出强化效应。
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2025年第45卷第2期
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doi: 10.3969/j.issn.0253-6099.2025.02.034
  • 接收时间：2024-09-28
  • 首发时间：2026-03-19
  • 出版时间：2025-04-01
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    中南大学　材料科学与工程学院，湖南　长沙　410083

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刘志义（1962—），男，湖南邵阳人，教授，博士研究生导师，主要从事铝合金的基础研究及应用技术开发。E-mail：
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2种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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