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中华手工 2010年第9期 24-27页

作者：何心 John hardy

从河水流过的圆石、或圆或缺的月亮,到巴厘岛上独有的地理特质,都是设计师的灵感之源,John hardy的每件首饰都俨如在跟大自然对话。

关键词：大自然对话 hardy 设计师水流

Guest editorial:Molybdenum alloying:more than hardenability

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Advances in Manufacturing 2020年第1期8卷 1-2页

作者： hardy Mohrbacher NiobelCon bvba SchildeBelgium Department of Materials Engineering KU LeuvenLeuvenBelgium

Molybdenum is a transitional metal in the periodic table of elements where it ranks in position 42 in the 5th period and group VI *** a high melting point of 2623℃,molybdenum belongs to the so-called refractory ***,as pure metal it finds many applications where high temperatures are encountered during operation,for example in ***,nearly 80%of all molybdenum produced every year by the world’s mining industry is used as addition to iron and steel *** and alloy steels account for 40%of molybdenum use,followed by stainless steels(23%),tool steels and castings(both around 8%).

关键词： alloying alloy steel

Metallurgical concepts for optimized processing and properties of carburizing steel

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Advances in Manufacturing 2016年第2期4卷 105-114页

作者： hardy Mohrbacher NiobelCon bvba Schilde Belgium

Carburized steel grades are widely used in applications where high surface near hardness is required in combination with good core toughness as well as high strength and fatigue resistance. The process of carburizing lower to medium carbon containing steel can generally provide this combination of properties and has been prac- ticed for several decades. Such steel is essential in the vehicle power-train, machines and power generation equipment. However, the increasing performance demands by such applications as well as economical considerations forced steel producers to develop better alloys and fabri- cators to design more efficient manufacturing processes. The present paper describes recent concepts for alloy design optimization of carburizing steel and demonstrates the forthcoming beneficial consequences with regard to manufacturing processes and final properties.

关键词： High temperature carburizing Grain sizecontrol Distortion control - Integrated manufacturing Plasma nitriding - Micro pitting - Tooth root fatiguestrength Molybdenum steel Niobium microalloying

Guest editorial of "Application of high strength steels in lightweight commercial vehicles"

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Advances in Manufacturing 2015年第1期3卷 1-2页

作者： hardy Mohrbacher NiobelCon bvba SchildeBelgium

New and increasingly sharp laws for the reduction of emissions from commercial vehicles entered into force in the European Union since 1993 with the aim of substan-tially reducing pollutants and emissions from trucks and buses. Thereby the maximum levels for the emission of particulate matter （basically soot particles） as well as oxides of nitrogen （NOx） have been subsequently lowered. To comply with these demands, commercial vehicle producers had to introduce new emission reducing technologies of which exhaust-gas recirculation （EGR）,

关键词： Guest editorial of Application of high strength steels in lightweight commercial vehicles high

A MONOTONE DOMAIN DECOMPOSITION ALGORITHM FOR SOLVING WEIGHTED AVERAGE APPROXIMATIONS TO NONLINEAR SINGULARLY PERTURBED PARABOLIC PROBLEMS

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Journal of Computational Mathematics 2008年第1期26卷 76-97页

作者： Igor Boglaev Matthew hardy Institute of Fundamental Sciences Massey UniversityPrivate Bag 11-222Palmerston NorthNew Zealand Mathematical Sciences Institute Australian National UniversityCanberraAustralia 0200

This paper presents and analyzes a monotone domain decomposition algorithm for solving nonlinear singularly perturbed reaction-diffusion problems of parabolic type. To solve the nonlinear weighted average finite difference scheme for the partial differential equation, we construct a monotone domain decomposition algorithm based on a Schwarz alternating method and a box-domain decomposition. This algorithm needs only to solve linear discrete systems at each iterative step and converges monotonically to the exact solution of the nonlinear discrete problem. domain decomposition algorithm is estimated The rate of convergence of the monotone Numerical experiments are presented.

关键词： Parabolic reaction-diffusion problem Boundary layers O-method Monotone domain decomposition algorithm Uniform convergence

Combined Effects of Nb and B MicroAlloying in Molybdenum Based Ultra Low Carbon Bainitic (ULCB) Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 785-791页

作者： hardy Mohrbacher NiobelCon bvba 2970 SchildeBelgium

ULCB steels have a great potential for structural as well as automotive applications due to the lean alloying concept and the favorable combination of strength and *** steels are being considered as the material of choice for many advanced applications where yield strength above 500 MPa is required to reduce component *** Mo has been a key alloying element in producing such *** order to push the property envelope of ULCB steels it is interesting to combine Mo alloying with the microalloying elements Nb and *** effects between these elements bear synergies that cannot be achieved by single *** paper demonstrates how these synergies can be beneficially used in combination with appropriate processing.

关键词： grain refinement bainitic transformation precipitation hardening accelerated cooling tempering

Reverse metallurgical engineering towards sustainable manufacturing of vehicles using Nb and Mo alloyed high performance steels

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Advances in Manufacturing 2013年第1期1卷 28-41页

作者： hardy Mohrbacher NiobelCon bvba 2970 Schilde Belgium

Steel is the dominant construction material for most industrial goods such as equipments, structures, buildings or vehicles. Although there have been great advances in steel technology over the last 4 decades, the industry currently faces serious sustainability challenges with regard to energy conservation, reduction of CO2 emission and a generally more efficient use of resources. The principal connotation in this respect is increasing steel strength allowing to reduce component weight. However, it is also necessary considering in how far the modified steel properties interfere with typical manufacturing techniques established in the processing chain. A feasible method in this sense is a reverse approach starting from detailed knowledge of the manufacturing process and translating it back into the most suitable metallurgical and microstruc- tural design of steel. Modifying steels towards better manufacturing performance typically involves innovative alloying and metallurgical processing concepts. Niobium and molybdenum are two of the most powerful alloying elements in helping to adapt microstructures and properties with regard to downstream manufacturing processes. This paper will highlight several examples how a reverse met- allurgical engineering approach can be successfully applied to optimize the efficiency of subsequent manufacturing processes with a focus on the automotive industry.

关键词： Automotive flat steel - Engineering steel Stamping Bending - Profiling - Press hardening Welding Cutting Case carburizing

On De Giorgi's conjecture: Recent progress and open problems

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Science China Mathematics 2018年第11期61卷 1925-1946页

作者： hardy Chan Juncheng Wei Department of Mathematics University of British Columbia

In 1979,De Giorgi conjectured that the only bounded monotone solutions to the Allen-Cahn equation △u+u-u^3=0 in R^N,are *** conjecture and its connection with minimal surfaces and Toda systems are the subject of this... 详细信息

关键词： De Giorgi's conjecture classification of solutions Allen-Cahn equation minimal surfaces Toda systems

A Strategy of Avoiding Delayed Fracture in Ultrahigh Strength Automotive Steels by Nb Microalloying

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Journal of Iron and Steel Research International 2011年第S1期18卷 893-897页

作者： hardy Mohrbacher NiobelCon bvba 2970 SchildeBelgium

Recently the automotive industry has been confronted with the phenomenon of delayed *** phenomenon was not relevant in earlier years since the strength level of the steels was generally below a critical ***,delayed fracture is not necessarily related to an absolute strength value but rather to microstructural features as well as pre-existing micro-damage in the material that are likely to occur in ultrahigh strength *** microalloying in combination with appropriate processing can effectively help to improve the resistance against delayed fracturing in such *** paper outlines a strategy how to achieve this based on microstructural control and hydrogen trapping.

关键词： delayed fracture niobium microalloying grain refinement hydrogen trapping molybdenum alloying

Innovative manufacturing technology enabling light weighting with steel in commercial vehicles

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Advances in Manufacturing 2015年第1期3卷 3-18页

作者： hardy Mohrbacher Marius Spottl Jesse Paegle NiobelCon bvba SchildeBelgium WISCO Lasertechnik GmbH RavensburgGermany Gestamp Sao PauloBrazil

Improved manufacturing technology is often needed when working with high strength steel. In this re- spect manufacturing technology has to adapt to the altered （and typically reduced） formability and weldability of modern high strength steel. However, this is a rather passive approach from a manufacturing point of view. An indeed much more powerful approach is to generate synergies between innovative manufacturing technology, design and material enabling additional weight savings and efficiency gains. Laser-based material processing, in particular laser welding, offers a wide range of opportunities in this sense. Furthermore, hot stamping and roll forming open up new possibilities for advanced manufacturing of commercial vehicle components. Applications and examples of these technologies will be given in terms of producing innovative semi-products as well as final components.

关键词： Commercial vehicles . Light weightingstrength steel . Roll forming - Press forming - Hotstamping . Tailor-welded blanks .Tailor-welded coils