Scripta Materialia最新文献

Insights in improving creep resistance of low-cost 2nd-generation nickel based single crystal superalloys at intermediate temperature

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-12-02 DOI: 10.1016/j.scriptamat.2024.116481

Peisen Lv , Lirong Liu , Zhangrui Zhou , Chuntao Ge , Jian Zhang , Yunsong Zhao

引用次数: 0

Influence of non-rare earth elements on basal stacking fault energy of Mg binary alloys in solid solution

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-12-02 DOI: 10.1016/j.scriptamat.2024.116479

Lei Wang , Zhihua Dong , Bin Jiang , Cuihong Wang , Xiaoying Qian , Levente Vitos , Fusheng Pan

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Chemical composition dependent atom clustering during natural aging in Al-Mg-Si alloys

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-30 DOI: 10.1016/j.scriptamat.2024.116474

Chunan Li , Calin D. Marioara , Constantinos Hatzoglou , Sigmund J. Andersen , Randi Holmestad , Yanjun Li

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Machine learning-assisted creep life prediction and empirical formula generation for 9-12% Cr steel

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-30 DOI: 10.1016/j.scriptamat.2024.116480

Yifan Wu , Jingzi Zhang , Chengquan Zhong , Jiakai Liu , Kailong Hu , Xi Lin

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New insights into multiple thickening mechanisms of T1 precipitates in Al-Cu-Li alloys 铝-铜-锂合金中 T1 沉淀多重增厚机制的新见解

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-28 DOI: 10.1016/j.scriptamat.2024.116477

Lipeng Ding , Yaru Ning , Qingbo Yang , Yaoyao Weng , Chenglin Wang , Zhihong Jia

{"title":"New insights into multiple thickening mechanisms of T1 precipitates in Al-Cu-Li alloys","authors":"Lipeng Ding , Yaru Ning , Qingbo Yang , Yaoyao Weng , Chenglin Wang , Zhihong Jia","doi":"10.1016/j.scriptamat.2024.116477","DOIUrl":"10.1016/j.scriptamat.2024.116477","url":null,"abstract":"<div><div>The thickening behavior of T<sub>1</sub> precipitates in an over-aged Al-Cu-Li alloy was studied using high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), energy dispersive X-ray spectroscopy (EDX) and first-principles calculation. This study revealed four distinct T<sub>1</sub> thickening mechanisms occur in the Al-Cu-Li alloy during long-term over-aging. The most prevalent mechanism, designated Type-I, is featured by a shared Al/Li layer in-between two T<sub>1</sub> units. In contrast, Type-II and Type-IV involve two separated Al/Li layers with different misalignments, while the Type-III involves the insertion of a Cu-layer in-between two separated T<sub>1</sub> units. These four different thickening processes can coexist and interconvert, resulting in diverse T<sub>1</sub> precipitate configurations. The multiple T<sub>1</sub> thickening mechanisms can regulate the lattice misfit of the T<sub>1</sub>/Al matrix interface, which potentially affect the strengthening and thermal stability of the T<sub>1</sub> phase.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116477"},"PeriodicalIF":5.3,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment 通过后热处理实现激光粉末床熔融制造镍钛合金的卓越超弹性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-27 DOI: 10.1016/j.scriptamat.2024.116476

Muchi Jiang , Hao Jiang , Rui Xi , Dechun Ren , Haibin Ji , Jiafeng Lei , Xiebin Wang

{"title":"Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment","authors":"Muchi Jiang , Hao Jiang , Rui Xi , Dechun Ren , Haibin Ji , Jiafeng Lei , Xiebin Wang","doi":"10.1016/j.scriptamat.2024.116476","DOIUrl":"10.1016/j.scriptamat.2024.116476","url":null,"abstract":"<div><div>In this work, we found that the long strip-like Ti<sub>4</sub>Ni<sub>2</sub>O<em><sub>x</sub></em> phase, concentrated at the grain boundaries (GBs), is the primary reason for the inferior superelasticity of laser powder bed fusion (L-PBF) fabricated NiTi alloys. In order to improve the superelasticity of L-PBF produced NiTi alloy, we proposed a simple yet efficient heat treatment protocol, which includes solution treatment at 1273 K for 3 h and subsequent aging treatment at 623 K for 0.5 h. The solution treatment leads to the spheroidization and coarsening of the Ti<sub>4</sub>Ni<sub>2</sub>O<em><sub>x</sub></em> phase, as well as the growth of NiTi grains. The grain growth captures Ti<sub>4</sub>Ni<sub>2</sub>O<em><sub>x</sub></em> phase at GBs into the grain interior, which improves largely the integrity of the matrix. Aging treatment introduces Ni<sub>4</sub>Ti<sub>3</sub> nanoprecipiates, which could improve the stability of superelasiticity. As a result, NiTi alloy with excellent superelasticity is obtained, which shows a recovery rate of >80 % (pre-strian of 5 %) after 317 cycles.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116476"},"PeriodicalIF":5.3,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strengthening the {0001} basal texture of α phases for extruded TNM alloy by high magnetic field heat treatment at 1290 ℃ 通过 1290 ℃ 高磁场热处理强化挤压 TNM 合金中 α 相的 {0001} 基底纹理

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-26 DOI: 10.1016/j.scriptamat.2024.116470

Yarong Wang, Hongchao Kou, Mengyu Jia, Yonghao Yu, Yuqing Li, Jun Wang, Jinshan Li

{"title":"Strengthening the {0001} basal texture of α phases for extruded TNM alloy by high magnetic field heat treatment at 1290 ℃","authors":"Yarong Wang, Hongchao Kou, Mengyu Jia, Yonghao Yu, Yuqing Li, Jun Wang, Jinshan Li","doi":"10.1016/j.scriptamat.2024.116470","DOIUrl":"10.1016/j.scriptamat.2024.116470","url":null,"abstract":"<div><div>The effect of the magnetic field heat treatment on the high-temperature α phase orientation for extruded TNM alloy was studied. Results show that the strength of {0001} basal texture ({0001} crystal plane is parallel to the extrusion direction) increased after holding for 30 min at 1290 ℃ under the 10T magnetic field. The main reason is due to the preferred growth of α phases with <11-20> orientation (<11-20> crystal orientation is normal to the extrusion direction) during the holding time and the growth behavior of α phases with <11-20> orientation is related to the magnetic field direction. Preferred growth of α phases with <11-20> orientation is mainly by consuming adjacent α phases with <10-10> orientation during holding time at 1290 ℃ under the 10T magnetic field. If the magnetic field direction is parallel to the extrusion direction, the preferred growth of α phases with <11-20> orientation is attributed to the magnetic field inducing the increasing of grain boundary mobility. If the magnetic field direction is normal to the extrusion direction, the preferred growth of α phases with <11-20> orientation is caused by the magnetic driving force generated in grain boundaries under the 10T magnetic field.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116470"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deformation pseudo-twinning of the L21-ordered intermetallic superlattice L21 有序金属间超晶格的变形伪孪晶

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-26 DOI: 10.1016/j.scriptamat.2024.116468

Bailey E. Rhodes , Pulkit Garg , Nicolò Maria della Ventura , Justin A. Mayer , Irene J. Beyerlein , Daniel S. Gianola

{"title":"Deformation pseudo-twinning of the L21-ordered intermetallic superlattice","authors":"Bailey E. Rhodes , Pulkit Garg , Nicolò Maria della Ventura , Justin A. Mayer , Irene J. Beyerlein , Daniel S. Gianola","doi":"10.1016/j.scriptamat.2024.116468","DOIUrl":"10.1016/j.scriptamat.2024.116468","url":null,"abstract":"<div><div>Ordered intermetallic materials are promising candidates for applications in extreme environments due to the strong localized bonding schemes that stabilize the structures against degradation. Here, we investigate the propensity for deformation twinning modes in the <em>L</em>2<sub>1</sub>-ordered MnCu<sub>2</sub>Al intermetallic by inducing a state of severe plastic deformation. <em>Post-mortem</em> microstructural analysis reveals the presence of meso-scale deformation twins accompanied by a high degree of nano-scale crystalline heterogeneity. The orientation relationship between the parent and twin structures is consistent with activation of the <span><math><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mo>{</mo><mn>112</mn><mo>}</mo></math></span> deformation twinning mode. <em>Ab initio</em> generalized stacking fault energy curve calculations corresponding to <span><math><mo>〈</mo><mn>111</mn><mo>〉</mo><mo>{</mo><mn>112</mn><mo>}</mo></math></span> twinning shear suggest that the magnitude of the twinning partial is <span><math><mfrac><mrow><mn>1</mn></mrow><mrow><mn>4</mn></mrow></mfrac><mo>〈</mo><mn>111</mn><mo>〉</mo><mo>{</mo><mn>112</mn><mo>}</mo></math></span> and results in the local formation of a metastable orthorhombic phase within the pseudo-twin. This work highlights the discrepancy between the deformation modes of ordered/disordered structures and promotes an increased awareness for the role that long-range chemical order plays in determining deformation modes.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116468"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remelting-based microstructure engineering in laser powder bed fusion: A case study in 316L stainless steel 激光粉末床熔化中基于重熔的微结构工程：316L 不锈钢案例研究

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-25 DOI: 10.1016/j.scriptamat.2024.116469

Tianyi Lyu, Yu Zou

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Comments on “Experimental evaluation of the Peierls stresses in a variety of crystals and their relation to the crystal structure” 关于 "对各种晶体中佩尔斯应力的实验评估及其与晶体结构的关系 "的评论

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-11-25 DOI: 10.1016/j.scriptamat.2024.116472

Yi Li, Junnan Lin

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