Article(id=1321935409349772203, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1321927083589227197, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1001-4381.2025.000542, pmid=null, cstr=32421.14.j.issn.1001-4381.2025.000542, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1758556800000, receivedDateStr=2025-09-23, revisedDate=null, revisedDateStr=null, acceptedDate=1761148800000, acceptedDateStr=2025-10-23, onlineDate=1793103561960, onlineDateStr=2026-10-27, pubDate=1776614400000, pubDateStr=2026-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793103561960, onlineIssueDateStr=2026-10-27, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793103561960, creator=13701087609, updateTime=1793103561960, updator=13701087609, issue=Issue{id=1321927083589227197, tenantId=1146029695717560320, journalId=1220038251117760515, year='2026', volume='54', issue='4', pageStart='1', pageEnd='345', issueExtLink='null', onlineDate='null', pubDate='1776614400000', pubDateStr='2026-04-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793101576945, creator='13701087609', updateTime=1793101576945, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=217, endPage=228, ext={EN=ArticleExt(id=1321935409559487404, articleId=1321935409349772203, tenantId=1146029695717560320, journalId=1220038251117760515, language=EN, title=Effect of casting wall thickness on microstructure and mechanical properties of K439B superalloy, columnId=1220689384450478826, journalTitle=Journal of Materials Engineering, columnName=RESEARCH ARTICLE, runingTitle=null, highlight=null, articleAbstract=
This work studies the microstructure and mechanical properties of K439B nickel-based superalloy castings with a wall thickness of 1-10 mm. The results show that the melt feeding capacity in thin-walled castings is poor, there are many shrinkage porosity in the 1 mm and 3 mm thin-walled castings, and the 10 mm thick-walled casting has the lowest porosity. Due to the increase of melt solidification rate, all of the secondary dendrite arm spacing, grain size and γ' phase size of the castings increase with the increase of thickness. The tensile tests at room temperature show that the mechanical properties of thin-walled castings are significantly affected by the evolution of microstructure. Due to the synergistic effect of the fine grain strengthening mechanism and precipitate shearing mechanism, the 1 mm thick casting exhibits the highest ultimate tensile strength (1037 MPa) and elongation to fracture (5.6%).The 3 mm thick casting shows the poorest tensile strength and ductility,with values of 890 MPa and 4.1%, respectively, which can be attributed to its highest porosity level and the resulting severe stress concentration. Although the coarsening of grains and γ' phase reduces the grain boundary strengthening effect of the 10 mm thick casting, the reduced porosity and limited dislocation localization effectively impede the crack propagation,thereby preventing a pronounced deterioration in elongation to fracture.
, authors=Jianzhuang LI
1, Lin HE
2, Huan SHE
1, Chengbo XIAO
3, Di WANG
2, Zhongfeng CHEN
2, Xiang ZHAO
2, Hanjie LI
1, Anping DONG
2, authorsList=Jianzhuang LI, Lin HE, Huan SHE, Chengbo XIAO, Di WANG, Zhongfeng CHEN, Xiang ZHAO, Hanjie LI, Anping DONG, authorCompany=null, correspAuthors=Lin HE, Huan SHE, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1321935413594407880, articleId=1321935409349772203, tenantId=1146029695717560320, journalId=1220038251117760515, language=CN, title=铸件壁厚对K439B高温合金微观组织及力学性能影响研究, columnId=1220689384622445292, journalTitle=材料工程, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
本工作研究了1~10 mm壁厚的K439B镍基高温合金铸件的微观组织和力学性能。结果表明,薄壁铸件中熔体补缩能力差,1 mm和3 mm薄壁铸件中存在较多的疏松孔隙,壁厚10 mm铸件孔隙率最低。同时,随着熔体凝固速率的变化,铸件的二次枝晶臂间距、晶粒尺寸和γ′相尺寸都随着厚度的增加而增加。室温下拉伸实验结果表明,薄壁铸件的力学性能受微观组织演变影响显著。1 mm薄壁铸件由于细晶强化与析出相剪切机制协同作用,在室温拉伸实验中具有最优的抗拉强度(1037 MPa)与断后伸长率(5.6%);3 mm壁厚铸件孔隙最大,导致应力集中严重,因此其抗拉强度与断后伸长率最低,分别为890 MPa和4.1%;尽管晶粒与γ′相粗化使10 mm壁厚铸件的晶界强化效果降低,但低的孔隙率与小的位错局部化程度提高了裂纹扩展阻力,从而使其断后伸长率未出现明显劣化。
, authors=李建壮
1, 何林
2, 佘欢
1, 肖程波
3, 王迪
2, 陈忠奉
2, 赵祥
2, 李晗杰
1, 董安平
2, authorsList=李建壮, 何林, 佘欢, 肖程波, 王迪, 陈忠奉, 赵祥, 李晗杰, 董安平, authorCompany=null, correspAuthors=何林, 佘欢, authorNote=null, correspAuthorsNote=
何林(1991—),男,助理教授,博士,研究方向为高温合金反重力精密铸造,联系地址:上海市闵行区东川路800号上海交通大学材料学院(200240),E-mail:
hejucen@sjtu.edu.cn佘欢(1986—),女,讲师,博士,研究方向为新型生物医用钛合金,联系地址:上海市奉贤区海泉路100号上海应用技术大学智能技术学部(201418),E-mail:huanshe @sit.edu.cn
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Material parameters of K439B alloy (a)conductivity;(b)viscosity;(c)density;(d)volume fraction of solid, figureFileSmall=BxrLLx5J4w/d52zfi2gUvA==, figureFileBig=uV5EmxSe9aSBR9EMPFIWrg==, tableContent=null), ArticleFig(id=1321935421928488973, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图3, caption=
K439B合金的材料参数 (a)电导率;(b)黏度;(c)密度;(d)固体体积分数, figureFileSmall=BxrLLx5J4w/d52zfi2gUvA==, figureFileBig=uV5EmxSe9aSBR9EMPFIWrg==, tableContent=null), ArticleFig(id=1321935422003986446, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=EN, label=Fig.4, caption=
Pore experimental and simulation results of castings with different wall thickness, figureFileSmall=2FCzmHD6+5qgtGhZSiNi7g==, figureFileBig=Yeow3un2mFGkxjDrzL+xQQ==, tableContent=null), ArticleFig(id=1321935422062706703, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图4, caption=
不同壁厚铸件的孔隙的实验(1)及模拟(2)结果(a)1 mm;(b)3 mm;(c)10 mm
(a)1 mm;(b)3 mm;(c)10 mm
, figureFileSmall=2FCzmHD6+5qgtGhZSiNi7g==, figureFileBig=Yeow3un2mFGkxjDrzL+xQQ==, tableContent=null), ArticleFig(id=1321935422150787088, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=EN, label=Fig.5, caption=
Cooling rate curves and temperature gradient distribution maps for castings with different wall thicknesses(a)cooling curve;(b)temperature field distribution
, figureFileSmall=B/2d1zLB66O1/cJeZxh3Xw==, figureFileBig=QQi6VSyNpKZjprAXkQ8rsA==, tableContent=null), ArticleFig(id=1321935422264033297, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图5, caption=
不同壁厚铸件的冷却速率曲线和温度场分布图(a)冷却曲线;(b)温度场分布
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Cross-sectional dendritic morphology of castings with different wall thicknesses, figureFileSmall=cVriN7SbQ7P3IvV+s2vrZw==, figureFileBig=7QHyM57fdrjpMV8IeHIJ3A==, tableContent=null), ArticleFig(id=1321935422435999763, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图6, caption=
不同壁厚铸件的横截面枝晶形貌(a)1 mm;(b)3 mm;(c)10 mm
(a)1 mm;(b)3 mm;(c)10 mm
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Grain morphologies(1) and grain size distributions(2) of castings with different wall thicknesses, figureFileSmall=0cpjPYHxC0NwSU1zEQDoGw==, figureFileBig=4B47AvP1i94PcO8EFlcicg==, tableContent=null), ArticleFig(id=1321935422607966229, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图7, caption=
不同壁厚铸件的晶粒形貌(1)与晶粒尺寸分布(2)(a)1 mm;(b)3 mm;(c)10 mm
(a)1 mm;(b)3 mm;(c)10 mm
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SEM morphologies and EDS analysis of carbides with different wall thicknesses(a)1 mm;(b)3 mm;(c)10 mm;(d)EDS analysis of 1 mm casting
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不同壁厚碳化物SEM形貌和EDS分析(a)1 mm;(b)3 mm;(c)10 mm;(d)1 mm铸件EDS分析
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γ′ phase morphology of different wall thickness castings in as-cast (1), solid solution (2) and heat treatment state (3), figureFileSmall=CmAuOF3w/mLrL42sgFB7Wg==, figureFileBig=cnuNrrvdsq4rLz6W/alAhA==, tableContent=null), ArticleFig(id=1321935422956093465, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图9, caption=
不同壁厚铸件在铸态(1)、固溶后(2)和热处理状态(3)下的γ'相形貌(a)1 mm;(b)3 mm;(c)10 mm
(a)1 mm;(b)3 mm;(c)10 mm
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Tensile properties of castings with different wall thicknesses(a)engineering stress-strain curves;(b)YS and UTS
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不同壁厚铸件拉伸性能(a)工程应力-应变曲线;(b)屈服强度和抗拉强度
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Fracture morphology of castings with different wall thicknesses (a)-(c)1 mm;(d)-(f)3 mm;(g)-(i)10 mm, figureFileSmall=nMsrMGXgyxdziQfIzuKAjA==, figureFileBig=BhHvnyFPmCrKRPyHsOtk6A==, tableContent=null), ArticleFig(id=1321935423316803613, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图11, caption=
不同壁厚铸件断口形貌 (a)~(c)1 mm;(d)~(f)3 mm;(g)~(i)10 mm, figureFileSmall=nMsrMGXgyxdziQfIzuKAjA==, figureFileBig=BhHvnyFPmCrKRPyHsOtk6A==, tableContent=null), ArticleFig(id=1321935423388106782, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=EN, label=Fig.12, caption=
KAM maps of castings with different wall thicknesses after tensile test, figureFileSmall=lxe0aLpV/YVZ3ddBUokDpQ==, figureFileBig=6Sj8a8ZzbHMRkpjwW7W+tw==, tableContent=null), ArticleFig(id=1321935423455215647, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图12, caption=
不同壁厚铸件拉伸测试后KAM图(a)1 mm;(b)3 mm;(c)10 mm
(a)1 mm;(b)3 mm;(c)10 mm
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Surfaces roughness of castings with different wall thicknesses after tensile test (a)1 mm;(b)3 mm;(c)10 mm;(d)line roughness profile, figureFileSmall=sNEVLHA+NYYwcmwctKu/dw==, figureFileBig=ab7legLNiOD0YMqP9U0/nQ==, tableContent=null), ArticleFig(id=1321935423602016289, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=CN, label=图13, caption=
不同壁厚铸件拉伸测试后的表面粗糙度 (a)1 mm;(b)3 mm;(c)10 mm;(d)线粗糙度曲线, figureFileSmall=sNEVLHA+NYYwcmwctKu/dw==, figureFileBig=ab7legLNiOD0YMqP9U0/nQ==, tableContent=null), ArticleFig(id=1321935423685902370, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1321935409349772203, language=EN, label=Table 1, caption=
Chemical compositions of K439B alloy (mass fraction/%)
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| Cr | Co | Al | Ti | Nb | W | Ta | B | Zr | C | Ni |
|---|
| 22.85 | 23.15 | 2.24 | 3.45 | 0.11 | 1.28 | 2.23 | 0.02 | 0.06 | 0.14 | Bal. |
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K439B合金的化学成分(质量分数/%)
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| Cr | Co | Al | Ti | Nb | W | Ta | B | Zr | C | Ni |
|---|
| 22.85 | 23.15 | 2.24 | 3.45 | 0.11 | 1.28 | 2.23 | 0.02 | 0.06 | 0.14 | Bal. |
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Size of γ′ phase in different states
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| Thickness/mm | As-cast/nm | Solid solution/nm | Heat treatment/nm |
|---|
| 1 | 214 | 12 | 66 |
| 3 | 234 | 15 | 98 |
| 10 | 278 | 17 | 128 |
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不同状态的γ′尺寸
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| Thickness/mm | As-cast/nm | Solid solution/nm | Heat treatment/nm |
|---|
| 1 | 214 | 12 | 66 |
| 3 | 234 | 15 | 98 |
| 10 | 278 | 17 | 128 |
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Contribution of grain refinement to yield strength of castings with different wall thicknesses
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| Thickness/mm | Strength contribution/MPa |
|---|
| 1 | 59.67 |
| 3 | 36.67 |
| 10 | 27.49 |
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晶粒细化对不同壁厚铸件屈服强度的贡献
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| Thickness/mm | Strength contribution/MPa |
|---|
| 1 | 59.67 |
| 3 | 36.67 |
| 10 | 27.49 |
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