app / new case

engine 0.1, data 2026.09.05-1

New case

Five steps. The console on the right prints each rule from the registry with the numbers substituted; this draft is pre-filled with case C-0412.

draft C-0413

01Case type
Joint, coating or barrier
02Stack
Layers from the passport library
03Duty cycle
Temperature, pressure, environment, cycles
04Characterisation
Attach measured files
05Run
Rules R00 to R24

01 Case type

sets the rule path

JointR01 to R09, R16 to R19

Ceramic to metal, dissimilar alloys, additive builds

CoatingR16 to R18, R23

Thermal barrier, wear and environmental coatings

BarrierR10 to R15, R20, R21

Hydrogen, sour gas and diffusion barriers

02 Stack

from data/materials.json, 10 passports

Substrate or ceramic sideBuild or metal sideInterlayergraded: minimax rule R05 sets the step stress, R07 the step countDiffusion barrier

thickness in nm; rules R12 to R15

03 Duty cycle

data/duty_cycles.json

ScenarioPeak temperature, KPassesOperating temperature T_op, KSegmentsStandardRequired survival

04 Characterisation

formats from data/quantities.json

Measurement	Accepted format	Tightens	Status
XRD, grazing incidence	.xy, .xrdml, .raw converted to .xy	grain size R10, residual stress R11	mock: attached, simulated Cr_GID.xy
EBSD or TKD map	.ang, .ctf	grain-boundary fraction R12	required path: /uploads/C-0413/ebsd
SEM cross-section	image with scale bar	layer thickness R16	required path: /uploads/C-0413/sem
Permeation transient	.csv t and J	activation energy R12	not applicable to joints

Drop files here. Formats listed above and in the documentation, with the export path from each instrument's software.

05 Run

42 steps on this path

Runs selection, stress, grading, fracture, grain-boundary kinetics and sensitivity. Verdict, assumptions table and measure-next list follow.

Activity0 / 42 steps

01R00quality CSapphire, c-plane E = 435 GPa from MP-sapphire-c, quality C, form single_crystal, T window contains operating T.
02R00quality CSapphire, c-plane nu = 0.25 from MP-sapphire-c, quality C, form single_crystal, T window contains operating T.
03R00quality CSapphire, c-plane alpha = 7 x 1e-6 / K from MP-sapphire-c, quality C, form single_crystal, T window contains operating T.
04R00quality CInconel 718 E = 205 GPa from MP-in718, quality C, nearest T window, extrapolated by 570 K. Extrapolated.
05R00quality CInconel 718 nu = 0.3 from MP-in718, quality C, form AM_as_built, T window contains operating T.
06R00quality CInconel 718 alpha = 15.3 x 1e-6 / K from MP-in718, quality C, nearest T window, extrapolated by 520 K. Extrapolated.
07R00quality CSapphire, c-plane sigma_c = 800 MPa from MP-sapphire-c, quality C, form single_crystal, T window contains operating T.
08R00quality CNichrome 80/20 E = 214 GPa from MP-nicr-8020, quality C, form thin_film, T window contains operating T.
09R00quality CNichrome 80/20 nu = 0.31 from MP-nicr-8020, quality C, form thin_film, T window contains operating T.
10R00quality CNichrome 80/20 alpha = 13 x 1e-6 / K from MP-nicr-8020, quality C, form thin_film, T window contains operating T.
11R00quality CNichrome 80/20 sigma_y = 1 000 MPa from MP-nicr-8020, quality C, form thin_film, T window contains operating T.
12R00quality CChromium E = 279 GPa from MP-cr, quality C, form thin_film, T window contains operating T.
13R00quality CChromium nu = 0.21 from MP-cr, quality C, form thin_film, T window contains operating T.
14R00quality CMolybdenum E = 329 GPa from MP-mo, quality C, form thin_film, T window contains operating T.
15R00quality CMolybdenum nu = 0.31 from MP-mo, quality C, form thin_film, T window contains operating T.
16R00quality CInconel 718 sigma_y = 1 030 MPa from MP-in718, quality C, form AM_as_built, T window contains operating T.
17R01Sapphire, c-plane: M = E / (1 - nu) = 435 GPa / (1 - 0.25) = 580 GPa.
18R01Inconel 718: M = E / (1 - nu) = 205 GPa / (1 - 0.3) = 293 GPa.
19R02Delta alpha = alpha(Inconel 718) - alpha(Sapphire, c-plane) = 15.3 x 1e-6 / K - 7 x 1e-6 / K = 8.3 x 1e-6 / K.
20R03Delta T = T_process - T_op = 1 493 K - 293 K = 1 200 K.
21R04Direct joint: sigma = M_film x Delta alpha x Delta T = 293 GPa x 8.3 x 1e-6 / K x 1 200 K = 2.92 GPa.
22R05quality CGraded stack, n = 5: sigma_step = M_H Delta alpha Delta T / (n + 1) = 380 GPa x 8.3 x 1e-6 / K x 1 200 K / 6 = 0.63 GPa.
23R06Phi = sigma_step / sigma_c = 0.63 GPa / 0.8 GPa = 0.79. Passes, Phi <= 1.
24R07n_min = ceil(M_H Delta alpha Delta T / sigma_c) - 1 = ceil(4.73) - 1 = 4.
25R08Nichrome 80/20 membrane stress = E/(1 - nu) x Delta alpha x Delta T = 2.23 GPa; exceeds sigma_y 1 000 MPa, capped and shed plastically.
26R09Nichrome 80/20 plastic strain = (sigma_mem - sigma_y) / E = (2.23 GPa - 1 GPa) / 214 GPa = 0.58 %.
27R10mockChromium Cr 110, grazing incidence: Scherrer d = K lambda / (beta cos theta) with beta corrected 0.55° to 0.54°: d = 15.9 nm (in-plane); lower bound if strain broadening is present.
28R10mockChromium Cr 110, Bragg-Brentano: Scherrer d = K lambda / (beta cos theta) with beta corrected 0.37° to 0.36°: d = 24.1 nm (out-of-plane); lower bound if strain broadening is present.
29R11mockChromium sin^2 psi: sigma = (E / (1 + nu)) x slope / d_0 = (279 GPa / 1.21) x 0.0056 = 1.3 GPa.
30R12quality CChromium in Nickel at 1 493 K: D_gb = 4.43e-9 m2 / s, D_l = 5.11e-13 m2 / s; D_eff = D_l + (3 delta / d) D_gb with d = 15.9 nm, delta = 0.5 nm: 4.20e-10 m2 / s (100 % along boundaries).
31R13Chromium 150 nm: t_bt = h^2 / (6 D_eff) = 8.9 µs at 1 493 K. Harrison regime B.
32R14Chromium budget h^2 / 6 = 3.75e-15 m2; one LPBF pulse on IN718, 60 W, 80 us, bed 180 C pass consumes 99 % of it. N_surv = 1.01 passes.
33R15Monte Carlo, 4000 draws over h, d, D0_gb and Q_gb: P(survive 5) = 0.014. N_surv median 1.18, 5 to 95 % 0.39 to 3.46.
34R22Sapphire, c-plane / Molybdenum step 1: alpha_D = (E_bar_1 - E_bar_2) / (E_bar_1 + E_bar_2) = (464 GPa - 364 GPa) / (464 GPa + 364 GPa) = 0.121.
35R17quality CSapphire, c-plane / Molybdenum step 1: alpha_D = 0.121, edge delamination psi = 50.8° (interpolated omega table, TO VERIFY).
36R16Sapphire, c-plane / Molybdenum step 1: G = Z sigma^2 h / E_bar = 0.5 x (0.63 GPa)^2 x 0.64 µm / 364 GPa = 0.35 J / m2.
37R18quality CSapphire, c-plane / Molybdenum step 1: G_c(psi) = G_Ic [1 + tan^2((1 - lambda) psi)] = 8.5 J / m2 x 1.51 = 12.9 J / m2; margin G_c / G = 36.7. No delamination.
38R24Membrane gate: h_m sigma_y = 51 500 N / m against sum sigma_i h_i = 2 019 N / m; ratio 25.5. Passes.
39R23Process window over T_process 1 100 K to 1 900 K, 3 ramps: 67 % of cells pass R06, R18 and R13; feasible up to 1 600 K.
40R19Weakest interface: Chromium barrier by diffusion, margin 0.02. Shortest breakthrough: Chromium barrier at 8.9 µs against a duty of 420 µs. Stack fails at this interface.
41R20Sobol on log10 N_surv, Saltelli N = 256: Q_gb S_T 0.75, D0_gb S_T 0.25, grain size d S_T 0.09, barrier thickness h S_T 0.04.
42R21Measure next: 1. D0_gb by permeation or diffusion couple (.csv t and J), uncertainty to 10 %; 2. Q_gb by permeation or diffusion couple (.csv t and J), uncertainty to 10 %; 3. grain size d by EBSD (.ang), uncertainty to 5 %.
awaiting input

mock: simulated measurement. quality C: placeholder value, to verifyR00 to R24