Metallurgical and Materials Transactions A最新文献_第6页

Effect of Particle Size on Mechanical Properties of CoCrMo-Ni@Al2O3 Composites Prepared by Selective Laser Melting 粒度对选择性激光熔融法制备的 CoCrMo-Ni@Al2O3 复合材料力学性能的影响

Metallurgical and Materials Transactions A Pub Date : 2024-07-24 DOI: 10.1007/s11661-024-07480-y

Yu Cao, Wei Liu, Qiusheng Xie, Haoxin Sun, Peikang Bai

引用次数: 0

Effects of Direct Aging Heat Treatments on the Superelasticity of Nitinol Produced via Laser Powder Bed Fusion 直接老化热处理对通过激光粉末床熔融技术生产的镍钛诺超弹性的影响

Metallurgical and Materials Transactions A Pub Date : 2024-07-24 DOI: 10.1007/s11661-024-07513-6

Maria Beatrice Abrami, Marialaura Tocci, Dermot Brabazon, Marcello Cabibbo, Annalisa Pola

{"title":"Effects of Direct Aging Heat Treatments on the Superelasticity of Nitinol Produced via Laser Powder Bed Fusion","authors":"Maria Beatrice Abrami, Marialaura Tocci, Dermot Brabazon, Marcello Cabibbo, Annalisa Pola","doi":"10.1007/s11661-024-07513-6","DOIUrl":"https://doi.org/10.1007/s11661-024-07513-6","url":null,"abstract":"This work investigates the effects of short-time direct aging heat treatments on the mechanical properties and microstructure of additively manufactured Nitinol (NiTi) alloy. Cylindrical samples were produced through laser powder bed fusion (L-PBF), directly aged at different temperatures and compared to the solution annealed and aged conditions. Compression tests were carried out at room temperature both in cyclic mode at constant strain and incremental cyclic mode, to provide a comprehensive analysis on the superelastic features of NiTi after direct aging heat treatments. Furthermore, cyclic compression tests were performed at 37 °C to evaluate the superelastic effect at the body temperature and, therefore, the possibility to use these treatments for biomedical components. The effects of direct aging on the microstructure were characterized using transmission electron microscopy (TEM). High cyclic stability and superelastic recovery up to 10 pct of deformation emerged for the direct aged alloys. The comparable results obtained with and without the solution treatment points out that this step was not necessary in reaching superelasticity, proving the effectiveness of direct aging.","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":"261 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141776998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Competing High-Temperature Deformation Mechanisms in Mo(Si,Al)2–Al2O3 Composites Mo(Si,Al)2-Al2O3 复合材料中相互竞争的高温变形机制

Metallurgical and Materials Transactions A Pub Date : 2024-07-23 DOI: 10.1007/s11661-024-07520-7

Aina Edgren, Erik Ström, Magnus Hörnqvist Colliander

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Transient Thermoreflectance Investigation of Damping from Vibrating Dislocations in Oscillating Metal Films 振荡金属膜振动位错阻尼的瞬态热反射研究

Metallurgical and Materials Transactions A Pub Date : 2024-07-22 DOI: 10.1007/s11661-024-07516-3

K. Jagannadham

引用次数: 0

Cooling Rate Dependency of Retained δ-Ferrite in the Coarse-Grained Heat-Affected Zone of P92 Heat-Resistant Steel P92 耐热钢粗晶粒热影响区中残留的 δ 铁素体的冷却速率依赖性

Metallurgical and Materials Transactions A Pub Date : 2024-07-22 DOI: 10.1007/s11661-024-07519-0

Haoxin Liu, Ming Zhong, Fedor Panteleyenko, Cong Wang

引用次数: 0

Effect of Welding Thermal Cycling on Microstructures and Cryogenic Impact Toughness of Medium-Mn Low-Temperature Steel 焊接热循环对中锰低温钢微观结构和低温冲击韧性的影响

Metallurgical and Materials Transactions A Pub Date : 2024-07-21 DOI: 10.1007/s11661-024-07521-6

Qing Sun, Yu Du, Xiaonan Wang, Tao Liu, Zhen Tao, Lei Li, Zhihui Liao, Linxiu Du

{"title":"Effect of Welding Thermal Cycling on Microstructures and Cryogenic Impact Toughness of Medium-Mn Low-Temperature Steel","authors":"Qing Sun, Yu Du, Xiaonan Wang, Tao Liu, Zhen Tao, Lei Li, Zhihui Liao, Linxiu Du","doi":"10.1007/s11661-024-07521-6","DOIUrl":"https://doi.org/10.1007/s11661-024-07521-6","url":null,"abstract":"This work studied the effect of welding thermal cycling on the microstructures and cryogenic impact toughness of medium-Mn low-temperature steel by single-pass welding thermal simulation test. The microstructures of the heat-affected zone (HAZ) were characterized by optical microscopy, electron backscatter diffraction, X-ray diffraction, and transmission electron microscopy. The results indicated that the microstructures of fine-grain HAZ are fine-lath martensite with film-like retained austenite in the heat input range of 10 ~ 30 kJ/cm. Meanwhile, fine-grain HAZ has excellent low-temperature impact toughness, and the impact energy tested at − 40 °C can reach about 245 J. The coarse martensitic packet and block in the coarse grain HAZ seriously deteriorated the cryogenic impact toughness, and the greater the heat input, the worse the cryogenic impact toughness. The impact energy tested at − 40 °C was 71 J when the heat input was 10 kJ/cm. The cryogenic impact toughness of HAZ gradually deteriorated with the peak temperature increase because of the decrease of retained austenite content and the increase of martensitic lath width.","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relationship Between Process Parameters and Defects in Laser Powder Bed Fusion Additive Manufacturing of Crack-Sensitive Al–Cu–Mg Alloy 裂纹敏感铝铜镁合金激光粉末床熔融快速成型制造中工艺参数与缺陷之间的关系

Metallurgical and Materials Transactions A Pub Date : 2024-07-20 DOI: 10.1007/s11661-024-07498-2

Tengteng Sun, Ziqian Wang, Qianglong Wei, Yi Wu, Mingliang Wang, Lingyu Kong, Hongjian Jiang, Shimiao Wang, Zijue Tang, Hua Sun, Hongze Wang, Haowei Wang

{"title":"Relationship Between Process Parameters and Defects in Laser Powder Bed Fusion Additive Manufacturing of Crack-Sensitive Al–Cu–Mg Alloy","authors":"Tengteng Sun, Ziqian Wang, Qianglong Wei, Yi Wu, Mingliang Wang, Lingyu Kong, Hongjian Jiang, Shimiao Wang, Zijue Tang, Hua Sun, Hongze Wang, Haowei Wang","doi":"10.1007/s11661-024-07498-2","DOIUrl":"https://doi.org/10.1007/s11661-024-07498-2","url":null,"abstract":"Laser powder bed fusion (L-PBF) is an innovative technique used to manufacture complex and customized parts. However, fabricating crack-sensitive Al–Cu–Mg alloy L-PBF parts with controlled defect levels remains challenging, as the effects of processing parameters on defect evolution are not well understood. In this study, we systematically investigated the influence of laser power, laser scanning speed, and hatching space on defect formation and evolution in L-PBF printed Al–4.1Cu–1.5Mg–0.6Mn alloy. Our findings indicate that laser power and scanning speed greatly impact the occurrence of lack-of-fusion porosity, hot cracks, and gas-induced pores. Initially, the relative density of L-PBF printed samples increases (from 97 to 99 pct) with increasing volumetric energy density (from 200 to 830 J/mm3), but then decreases with further increases in volumetric energy density (>830 J/mm3). The introduction of alloying elements Cu and Mg leads to increased laser reflectivity and heat dissipation, which in turn affects hot cracking susceptibility (HCS) and reduces the printability of Al–Cu–Mg alloy. This research provides a process map to guide the L-PBF manufacturing of crack-sensitive Al–Cu–Mg alloys.","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":"337 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Al- and Ta-Modified Alloy 740 Superalloy Castings Produced in Non-vacuum Conditions—Microstructure and Selected Properties 在非真空条件下生产的铝和钽改性合金 740 超合金铸件--微观结构和部分性能

Metallurgical and Materials Transactions A Pub Date : 2024-07-20 DOI: 10.1007/s11661-024-07504-7

Małgorzata Grudzień-Rakoczy, Łukasz Rakoczy, Sebastian Lech, Tomasz Dudziak, Ewa Rząd, Marcin Goły, Marek Paćko, Konrad Chrzan, Rafał Cygan, Cecilia Poletti

{"title":"Al- and Ta-Modified Alloy 740 Superalloy Castings Produced in Non-vacuum Conditions—Microstructure and Selected Properties","authors":"Małgorzata Grudzień-Rakoczy, Łukasz Rakoczy, Sebastian Lech, Tomasz Dudziak, Ewa Rząd, Marcin Goły, Marek Paćko, Konrad Chrzan, Rafał Cygan, Cecilia Poletti","doi":"10.1007/s11661-024-07504-7","DOIUrl":"https://doi.org/10.1007/s11661-024-07504-7","url":null,"abstract":"The work focuses on characterizing the microstructure and selected properties of Al- (1.3 or 2.8 wt pct) and Ta-modified (2 or 3 or 4 wt pct) Alloy 740 Ni-based superalloy after heat treatment. The observations and analyses were conducted using thermodynamic simulations, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, steam oxidation, hardness, tensile, and stress rupture tests. The castings exhibit a typical dendritic structure, with the presence of fine γ′ precipitates, Nb-rich Laves phase precipitates, MC carbides, and MN nitrides are found in all modified castings. However, the presence of the η phase, G phase, and M23C6 is dependent on the superalloy’s chemical composition. At room temperature, the reference cast superalloy had an ultimate tensile strength and yield strength of 655 MPa and 477 MPa, respectively. In modified castings, the ultimate tensile strength and YS are higher, respectively, 713–1046 MPa and 705–903 MPa. After steam oxidation at 760 °C/1000 h, the mass gain of the modified castings was in the range of 0.339–0.429 mg/cm2. The addition of tantalum resulted in decreased oxidation resistance and the formation of the TiTaO4 oxide at the Cr2O3/superalloy interface.","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":"138 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving Stress Relief in Martensitic Stainless Steel Via High-Density Pulsed Electric Current Treatment 通过高密度脉冲电流处理实现马氏体不锈钢应力消除

Metallurgical and Materials Transactions A Pub Date : 2024-07-20 DOI: 10.1007/s11661-024-07522-5

Shaojie Gu, Daisuke Kobayashi, Xinming Yan, Chang Liu, Yasuhiro Kimura, Yuhki Toku, Yang Ju

{"title":"Achieving Stress Relief in Martensitic Stainless Steel Via High-Density Pulsed Electric Current Treatment","authors":"Shaojie Gu, Daisuke Kobayashi, Xinming Yan, Chang Liu, Yasuhiro Kimura, Yuhki Toku, Yang Ju","doi":"10.1007/s11661-024-07522-5","DOIUrl":"https://doi.org/10.1007/s11661-024-07522-5","url":null,"abstract":"This study examined the effect of high-density pulsed electric current (HDPEC) treatment on the residual stress relief of martensitic stainless steel SCS6. The findings indicate that applying HDPEC at 100 A/mm2 for 370 ms, or equivalent current conditions at a maximum temperature of approximately 735 °C, can nearly eliminate surface residual stresses. Moreover, this treatment resulted in a 7 pct increase in strength without deteriorating the ductility. X-ray diffraction and electron backscatter diffraction analysis found that defects (i.e., dislocations) within the grains were remarkably removed, which was the main reason for the residual stress removal. This study demonstrates the feasibility of HDPEC in eliminating residual stresses of martensitic stainless steels, presenting a promising alternative to traditional heat treatment. In addition, this method introduces possibilities for localized non-destructive treatments on substantial components, enabling rapid and straightforward repairs.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the Stress-Induced Movement of $$gamma /epsilon $$ Interfaces and Coalescence of $$epsilon $$ Martensite Variants Through Fractal Analysis 通过分形分析了解应力诱发的 $$gamma /epsilon $$ 界面移动和 $$epsilon $$ 马氏体变体的凝聚

Metallurgical and Materials Transactions A Pub Date : 2024-07-13 DOI: 10.1007/s11661-024-07482-w

Arpan Das

引用次数: 0