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金屬頂刊雙語導讀丨Scripta Mater. Vol.205, 1 Dec. 2021（上）

2021-12-03 來源：Goal Science

 

本期包含金屬材料領域論文9篇，涵蓋了鈦合金、鋁合金、增材制造、馬氏體等，國內科研單位包括西北工業大學等（通訊作者單位）。

 

Vol. 205 目錄

1. Heat-affected coarsening of β grain in titanium alloy during laser directed energy deposition

激光定向能量沉積鈦合金中β晶粒的熱影響粗化

 

2. A molecular dynamics study of path-dependent grain boundary properties in nanocrystals prepared using different methods

使用不同方法制備的納米晶體中路徑相關晶界特性的分子動力學研究

 

3. The mechanical response of additively manufactured IN625 thin-walled structures

增材制造IN625薄壁結構的機械響應

 

4. Predicting the energetics and kinetics of Cr atoms in Fe-Ni-Cr alloys via physics-based machine learning

通過基于物理的機器學習預測Fe-Ni-Cr合金中Cr原子的能量學和動力學

 

5. Observation of Portevin-le Chatelier effect in aluminum alloy 7075-w under a heterogeneous stress field

7075-w鋁合金非均質應力場下Portevin-le Chatelier效應的觀察

 

6. Cyclic response of additive manufactured 316L stainless steel: The role of cell structures

增材制造316L不銹鋼的循環響應：胞狀結構的作用

 

7. Impact of Ni alloying on Fe-C martensite ageing: an atomistic investigation

Ni合金化對Fe-C馬氏體時效的影響：一項原子尺度研究

 

8. Aperiodic structures of rod-shaped precipitates in a Mg-Zn-Al alloy

Mg-Zn-Al合金中棒狀析出物的非周期性結構

 

9. Giant magnetic-field-induced bending effect in Ni-Mn-Ga-Co-Cu melt-spun ribbons

Ni-Mn-Ga-Co-Cu熔紡薄帶中的巨大磁場誘導彎曲效應

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114180

1. Heat-affected coarsening of β grain in titanium alloy during laser directed energy deposition

激光定向能量沉積鈦合金中β晶粒的熱影響粗化

 

Aitang Xue?, Xin Lin, Lilin Wang, Xufei Lu, Hanlin Ding, Weidong Huang

Aitang Xue: atxue@mail.nwpu.edu.cn (西北工業大學)

https://doi.org/10.1016/j.scriptamat.2021.114180

 

摘要

鈦合金中β晶粒在增材制造 (AM) 過程中會受熱影響而粗化，這極大影響了實現像鍛造態的細β晶粒，但過去的研究忽視了這點。在項工作，我們報告了Ti6Al4V等軸β晶粒的顯著粗化發生在激光定向能量沉積過程中的瞬時高溫（β轉變溫度以上）熱循環下。 特別是初始β晶粒越小，能量密度越大，預熱溫度越高，粗化越顯著。同時，提出了一種用于預測增材制造鈦合金中粗化的β晶粒的尺寸的修正模型。 這些發現為增材制造條件下的β晶粒提供了更全面的認識，并對具有細等軸β晶粒的增材制造鈦合金的成分設計提供了重要指導。

向上滑動閱覽英文摘要

The heat-affected coarsening of β-grains in titanium alloy produced by additive manufacturing (AM), which would be important for the achievement of fine β-grain like forging, was completely neglected in the past. Here, we reported that the significant coarsening of equiaxed β-grain of Ti6Al4V happened under the instantaneous high-temperature (above β-transus) thermal cycling during laser directed energy deposition process. Especially, the coarsening becomes more striking in the cases of smaller initial β-grain, larger energy density and higher preheating-temperature. Meanwhile, a modified model used to predict the size of the coarsened β-grain of AM titanium alloy was proposed. These findings provide a more comprehensive understanding of the β-grains of AM titanium alloy and a significant guidance for the composition design of AM titanium alloy with fine equiaxed β-grains.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114183

2. A molecular dynamics study of path-dependent grain boundary properties in nanocrystals prepared using different methods

使用不同方法制備的納米晶體中路徑相關晶界特性的分子動力學研究

 

Hao Sun?, Laurent Karim Beland?

Hao Sun: hs126@queensu.ca

Laurent Karim Beland: laurent.beland@queensu.ca

https://doi.org/10.1016/j.scriptamat.2021.114183

 

摘要

晶界在熱力學上是不穩定的，因此，它們的特性應該是與路徑相關的，使用不同方法制備的納米晶中的晶界可能表現出不同的特性。使用分子動力學模擬，我們分別研究了通過淬火、預誘導成核位點凝固和Voronoi鑲嵌形成的不同納米體的晶界，并發現一些與路徑有關的特性：淬火模型的每個原子邊界能量較低，每個原子的邊界過剩自由體積較小，晶粒生長速度比Voronoi模型慢。我們推測這些差異歸因于淬火模型中大量的退火孿晶。此外，一些屬性與路徑無關，例如楊氏模量、泊松比以及晶界能量與過剩自由體積之間的比率。本研究的結果進一步加深了對納米晶結構-性能關系的理解，并為未來基于模擬的納米晶材料研究提供了指導。

向上滑動閱覽英文摘要

Grain boundaries are thermodynamically unstable. Hence, their properties should be path-dependent: grain boundaries in nanocrystals prepared using different methods might exhibit different properties. Using molecular dynamics simulations, we investigated grain boundaries of different nanocrystals formed by quenching, solidification with pre-induced nucleation sites, and Voronoi tessellation, respectively. Some properties were found to be path-depend: the quenched model has lower boundary energy per atom, smaller boundary excess free volume per atom, and slower grain growth than the Voronoi model. We surmise that these differences are attributed to the abundant annealing twins in the quenched model. On the other hand, other properties are path-independent, such as Young's modulus, Poisson's ratio, and the ratio between grain boundary energy and excess free volume. The results of this study further the understanding of the structural-property relationship of nanocrystals and provide guidance to future simulation-based studies of nanocrystalline materials.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114188

3. The mechanical response of additively manufactured IN625 thin-walled structures

增材制造IN625薄壁結構的機械響應

 

Arunima Banerjee, Sara Messina, Matthew R. Begley, Edwin J. Schwalbach, Michael A. Groeber, William D. Musinski, Paul A. Shade, Marie E. Cox, Jonathan D. Miller, Kevin J. Hemker?

Kevin J. Hemker: hemker@jhu.edu

https://doi.org/10.1016/j.scriptamat.2021.114188

 

摘要

與傳統制造相比，增材制造提供了增強的設計和拓撲復雜性，非常適合制造復雜的結構。這項工作中，我們提出了一種新的毫米級測試方法來評估激光粉床打印的 Inconel 625薄壁結構的特定位置的機械響應。通過高分辨率數字圖像與環境溫度毫級測試相結合，以了解T形試樣中塑性變形的進展。塑性應變集中在水平和垂直韌帶的交叉處，這意味著它們在設計過程中的重要性。EBSD圖像闡明了幾何結構在平面紋理發展中的作用。各向同性有限元模型無法完全預測打印樣本的力學性能響應，但由紋理測量驅動的各向異性模型產生了更好的一致性。這項工作說明了局部加工和微觀結構對增材制造部件的機械響應的重要性。

向上滑動閱覽英文摘要

Additive manufacturing offers enhanced design and topological complexity over traditional manufacturing and is well suited to fabricate complex structures. Here, we present a new milli-scale test method to assess the location-specific mechanical response of laser powder-bed printed Inconel 625 thin-walled structures. High-resolution digital image correlation was coupled with ambient temperature milli-scale tests to understand the progression of plastic deformation in T-shaped specimens. Plastic strains were concentrated around the intersection of the horizontal and vertical ligaments, emphasizing their importance in the design process. EBSD scans elucidated the role of geometry in the development of in-plane texture. Isotropic finite element models were unable to fully predict the response of printed specimens, but anisotropic models, motivated by the texture measurements, resulted in much better agreement. This work illustrates the importance of local processing and microstructure on the mechanical response of additively manufactured components.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114177

4. Predicting the energetics and kinetics of Cr atoms in Fe-Ni-Cr alloys via physics-based machine learning

通過基于物理的機器學習預測Fe-Ni-Cr合金中Cr原子的能量學和動力學

 

Yuchu Wang, Bita Ghaffari, Christopher Taylor, Simon Lekakh, Mei Li, Yue Fan?

Yue Fan: fanyue@umich.edu

https://doi.org/10.1016/j.scriptamat.2021.114177

 

摘要

奧氏體合金中Cr原子的能量和激活勢壘的分布在多種化學（例如固溶體與偏析狀態）和顯微結構（例如塊體與晶界）環境中的多類型樣品上進行了研究。借助基于物理的機器學習算法，發現可以根據局部電負性（χ）和局部原子堆積的自由體積 (Vv) 可靠地預測Cr原子的熱力學和動力學行為，并建立了χ-Vv參數空間中相應的預測圖。這些圖與現有實驗結果一致，并通過具有不同原子間力場的并行建模進行了驗證。同時討論了本研究在指導具有所需性能的奧氏體合金設計方面的潛力。

向上滑動閱覽英文摘要

The energy and activation barrier distributions of Cr atoms in austenitic alloys are investigated over a multiplicity of modeling samples across a wide range of chemical (e.g. solid solutions vs. segregated states) and microstructural (e.g. bulk vs. grain boundaries) environments. Assisted with a physics-based machine learning algorithm, it is found that the thermodynamic and kinetic behaviors of Cr atoms can be reliably predicted according to the local electronegativity (χ) and free volume of local atomic packing (Vv). The corresponding predictive maps in the χ-Vv parameter space are established, which are in line with existing experiments and validated by a parallel modeling with a different interatomic force field. The implications of the present study regarding its potential to guide the design of austenitic alloys with desired properties are also discussed.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114178

5. Observation of Portevin-le Chatelier effect in aluminum alloy 7075-w under a heterogeneous stress field

7075-w鋁合金非均質應力場下Portevin-le Chatelier效應的觀察

 

Yumi Choi, Jinjin Ha?, Myoung-Gyu Lee, Yannis P. Korkolis

Jinjin Ha: jinjin.ha@unh.edu

https://doi.org/10.1016/j.scriptamat.2021.114178

 

摘要

針對固溶熱處理的AA7075鋁板研究了Portevin-Le Chatelier（PLC）帶在使用平頭沖頭擴孔過程中的動力學。該實驗在準靜態應變率和室溫下進行，整個變形過程中孔周邊的全應變場由立體數字圖像相關系統測量。PLC帶活動的觀察是基于厚度應變率場。每個單獨的PLC帶似乎沿徑向排列，跨越不同的應力狀態，并在從成核到耗散的壽命期間沿圓周方向傳播。此外，在實驗過程中記錄了所有PLC帶的成核位置，這表明PLC帶的成核頻率受塑性各向異性的影響，并且與厚度應變水平成比例增加。

向上滑動閱覽英文摘要

The kinetics of Portevin-Le Chatelier (PLC) bands in the hole-expansion of a circular hole using a flat-headed punch are investigated for a solid-solution heat-treated AA7075 aluminum sheet. This experiment is performed under quasi-static strain-rate and at room temperature. The full strain field in the hole periphery during the entire deformation is measured by a stereo-type digital image correlation system. The observations of PLC band activity are based on the thickness strain-rate field. Each individual PLC band appears aligning along the radial direction, spanning diverse stress states, and propagates along the circumferential direction during the life time from nucleation to dissipation. Furthermore, the nucleation sites of all the PLC bands are recorded during the experiment, which shows that the nucleation frequency of a PLC band is influenced by the plastic anisotropy, and that it increases proportionally to the level of thickness strain.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114190

6. Cyclic response of additive manufactured 316L stainless steel: The role of cell structures

增材制造316L不銹鋼的循環響應：胞狀結構的作用

 

Luqing Cui?, Fuqing Jiang, Dunyong Deng, Tongzheng Xin, Xiaoyu Sun, Reza Taherzadeh Mousavian, Ru Lin Peng, Zhiqing Yang?, Johan Moverare?

Luqing Cui: luqcu85@liu.se

Zhiqing Yang: yangzq@imr.ac.cn（中國科學院金屬研究所）

Johan Moverare: johan.moverare@liu.se

https://doi.org/10.1016/j.scriptamat.2021.114190

 

摘要

我們報告了胞狀結構對增材制造（AM）316L不銹鋼（316LSS）疲勞行為的影響。與無胞狀結構樣品相比，全胞狀結構樣品的疲勞過程僅包括穩定和過載階段，沒有初始軟化階段。此外，全胞狀結構樣品具有更高的強度、更低的循環軟化率和更長的壽命。顯微分析顯示了晶粒取向、尺寸和形狀沒有差異。然而，全胞狀結構樣品顯示出平面位錯結構，而無胞狀結構樣品顯示出波狀位錯結構。胞狀結構的存在促進了平面滑移的激活，延遲了局部應變，最終增強了AM 316LSS的疲勞性能。

向上滑動閱覽英文摘要

We report the effect of cell structures on the fatigue behavior of additively manufactured (AM) 316L stainless steel (316LSS). Compared with the cell-free samples, the fatigue process of fully cellular samples only consists of steady and overload stages, without an initial softening stage. Moreover, the fully cellular sample possesses higher strength, lower cyclic softening rate and longer lifetime. Microscopic analyses show no difference in grain orientations, dimensions, and shapes. However, the fully cellular samples show planar dislocation structures, whereas the cell-free samples display wavy dislocation structures. The existence of cell structures promotes the activation of planar slip, delays strain localization, and ultimately enhances the fatigue performance of AM 316LSS.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114182

7. Impact of Ni alloying on Fe-C martensite ageing: an atomistic investigation

Ni合金化對Fe-C馬氏體時效的影響：一項原子尺度研究

 

Paul Eymeoud?, Liangzhao Huang, Philippe Maugis

Paul Eymeoud: paul.eymeoud@univ-amu.fr

https://doi.org/10.1016/j.scriptamat.2021.114182

 

摘要

該工作在原子尺度上對Ni合金化對Fe-C馬氏體時效的影響進行計算。使用 Climbing Image Nudged Elastic Band 技術，我們展示了α-鐵中Ni-C成對相互作用的排斥性，并證明了Ni合金化降低了與α-鐵中的間隙碳相關的遷移能和力偶極張量分量。成對相互作用、遷移能量和偶極子分量的計算值用于實施動力學蒙特卡羅方法。 我們發現鎳合金化：（i）對馬氏體熱力學穩定性的影響可以忽略不計，（ii）通過增加碳擴散率來加速時效動力學。

向上滑動閱覽英文摘要

We propose a computational investigation of Ni-alloying impact on Fe-C martensite ageing, at the atomic scale. Using the Climbing Image Nudged Elastic Band technique, we showed the repulsive nature of Ni-C pairwise interactions in α-iron, and demonstrated that Ni alloying lowers the migration energies and force dipole tensor components associated to an interstitial carbon in α-iron. Computed values of pairwise interactions, migration energies and dipole components were used to implement a Kinetic Monte-Carlo approach. We found that Ni alloying: (i) has negligible impact on martensite thermodynamical stability, (ii) accelerates ageing kinetics, by increasing carbon diffusivity.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114189

8. Aperiodic structures of rod-shaped precipitates in a Mg-Zn-Al alloy

Mg-Zn-Al合金中棒狀析出物的非周期性結構

 

Yunhe Zheng, Laure Bourgeois, Jian-Feng Nie?

Jian-Feng Nie: jianfeng.nie@monash.edu

https://doi.org/10.1016/j.scriptamat.2021.114189

 

摘要

長軸平行于[0001]α的棒狀析出物通常在Mg-Zn-Al合金中形成，提供強化效果。這些析出物是亞穩態的，通常被認為是MgZn2和/或Mg4Zn7相。在本文中，使用高角度環形暗場掃描透射電子顯微鏡在原子尺度上檢查了時效ZA84合金中析出棒狀物的橫截面結構。發現這些沉淀物既不是純MgZn2也不是純Mg4Zn7。棒狀析出物的結構在垂直于棒長軸的二維投影平面上不具有長程平移對稱性和長程5重旋轉對稱性。 然而，這些結構可以通過不同形狀的平鋪來描述，最常見的是四種這樣的形狀。這項工作中揭示的結構細節可能有助于使Mg-Zn-Al和Mg-Zn合金中的許多復雜析出物結構合理化。

向上滑動閱覽英文摘要

Rod-shaped precipitates with their long axis parallel to [0001]α commonly form in Mg-Zn-Al alloys, providing strengthening effects. These precipitates are metastable and are generally accepted to be the MgZn2 and/or Mg4Zn7 phases. In this paper, the cross-sectional structure of precipitate rods in an aged ZA84 alloy is examined at the atomic scale using high-angle annular dark-field scanning transmission electron microscopy. It is found that these precipitates are neither pure MgZn2 nor Mg4Zn7. The structures of the rod-shaped precipitates do not have long-range translational symmetry nor long-range 5-fold rotational symmetry in the two-dimensional projection plane perpendicular to the rod long axis. However, these structures can be described by the tiling of different shapes, with four such shapes being most frequently observed. The structural details revealed in this work may help rationalize the many complex precipitate structures in Mg-Zn-Al and Mg-Zn alloys.

 

 

SCRIPTA

Vol. 205, 1 Dec. 2021, 114203

9. Giant magnetic-field-induced bending effect in Ni-Mn-Ga-Co-Cu melt-spun ribbons

Ni-Mn-Ga-Co-Cu熔紡薄帶中的巨大磁場誘導彎曲效應

 

M.J. Szczerba?

M.J. Szczerba: m.szczerba@imim.pl

https://doi.org/10.1016/j.scriptamat.2021.114203

 

摘要

該文章首次報告了對通過熔體紡絲技術生產的Ni-Mn-Ga-Co-Cu合金的巨磁場誘導彎曲效應。在使用在1173 K下退火60分鐘以釋放內應力的帶材進行彎曲實驗期間觀察到了這種效果。在0.06T的極低磁場下觀察到彎曲效應的開始。小于0.2T的外部磁場產生的整體變形由塑性和彈性的貢獻組成。第一次是在初始彎曲周期中觀察到的，而后者占主導地位。

向上滑動閱覽英文摘要

The paper reports on the first observations of giant magnetic-field-induced bending effect in Ni-Mn-Ga-Co-Cu alloys produced by the melt-spinning technique. The effect was observed during bending experiments using ribbons that were initially annealed at 1173 K for 60 min in order to release the internal stress. Initiation of the bending effect was observed at very low magnetic field of 0.06T. The overall deformation, generated by external magnetic field of less than 0.2T, was composed of plastic as well as elastic contributions. The first was observed during the initial bending cycle, whereas, the latter dominated further on.